Black is the darkest color, the result of the absence or complete absorption of light. Like white and grey, it is an achromatic color, literally a colour without hue. It is one of the four primary colors in the CMYK colour model, along with cyan, yellow, and magenta, used in colour printing to produce all the additional colors. Black is often used to represent darkness; it is the symbolic opposite of white (or brightness).

Black was one of the first colours used by artists in neolithic cave paintings. In the fourteenth century, it began to be worn by royalty, the clergy, judges and government officials in much of Europe. It became the colour worn by English romantic poets, businessmen and statesmen in the nineteenth century, and a high fashion colour in the twentieth century.

In the Roman Empire, it became the colour of mourning, and over the centuries it was frequently associated with death, evil, witches and magic. According to surveys in Europe and North America, it is the colour most commonly associated with mourning, the end, secrets, magic, force, violence, evil, and elegance.

Etymology and language

The word black comes from Old English blæc ("black, dark", also, "ink"), from Proto-Germanic *blakkaz ("burned"), from Proto-Indo-European *bhleg- ("to burn, gleam, shine, flash"), from base *bhel- ("to shine"), related to Old Saxon blak ("ink"), Old High German blach ("black"), Old Norse blakkr ("dark"), Dutch blaken ("to burn"), and Swedish bläck ("ink"). More distant cognates include Latin flagrare ("to blaze, glow, burn"), and Ancient Greek phlegein ("to burn, scorch").

The Ancient Greeks at times used the same word to name different colors, if they had the same intensity. Kuanos' could mean both dark blue and black.

The Ancient Romans had two words for black: ater was a flat, dull black, while niger was a brilliant, saturated black. Ater has vanished from the vocabulary, but niger was the source of the country name Nigeria the English word Negro and the word for "black" in most modern Romance languages (French: noir; Spanish and Portuguese: negro; Italian: nero ).

Old High German additionally had two words for black: swartz for dull black and blach for a luminous black. These are parallelled in Middle English by the terms swart for dull black and blaek for luminous black. Swart still survives as the word swarthy, while blaek became the modern English black.

In heraldry, the word used for the black colour is sable, named for the black fur of the sable, an animal.

History and art

Prehistoric history

Black was one of the first colours used in art. The Lascaux Cave in France contains drawings of bulls and additional animals drawn by paleolithic artists between 18,000 and 17,000 years ago. They began by using charcoal, and then made more vivid black pigments by burning bones or grinding a powder of manganese oxide.

Ancient history

For the ancient Egyptians, black had positive associations; being the colour of fertility and the rich black soil flooded by the Nile. It was the colour of Anubis, the god of the underworld, who took the form of a black jackal, and offered protection against evil to the dead.

For the ancient Greeks, black was additionally the colour of the underworld, separated from the world of the living by the river Acheron, whose water was black. Those who had committed the worst sins were sent to Tartarus, the deepest and darkest level. In the centre was the palace of Hades, the king of the underworld, where he was seated upon a black ebony throne.

Black was one of the most important colours used by ancient Greek artists. In the sixth century BC, they began making black-figure pottery and later red figure pottery, using a highly original technique. In black-figure pottery, the artist would paint figures with a glossy clay slip on a red clay pot. When the pot was fired, the figures painted with the slip would turn black, against a red background. Later they reversed the process, painting the spaces between the figures with slip. This created magnificent red figures against a glossy black background.

In the social hierarchy of ancient Rome, purple was the colour reserved for the Emperor; red was the colour worn by soldiers (red cloaks for the officers, red tunics for the soldiers); white the colour worn by the priests, and black was worn by craftsmen and artisans. The black they wore wasn't deep and rich; the vegetable dyes used to make black weren't solid or lasting, so the blacks often turned out faded grey or brown.

In Latin, the word for black, ater and to darken, atere, were associated with cruelty, brutality and evil. They were the root of the English words "atrocious" and "atrocity".

Black was additionally the Roman colour of death and mourning. In the second century BC Roman magistrates began to wear a dark toga, called a toga pulla, to funeral ceremonies. Later, under the Empire, the family of the deceased additionally wore dark colours for a long period; then, after a banquet to mark the end of mourning, exchanged the black for a white toga. In Roman poetry, death was called the hora nigra, the black hour.

The German and Scandinavian peoples worshipped their own goddess of the night, Nótt, who crossed the sky in a chariot drawn by a black horse. They additionally feared Hel, the goddess of the kingdom of the dead, whose skin was black on one side and red on the other. They additionally held sacred the crow. They believed that Odin, the king of the Nordic pantheon, had two black crows, Huginn and Muninn, who served as his agents, travelling the world for him, watching and listening.

Postclassical history

In the early Middle Ages, black was commonly associated with darkness and evil. In Medieval paintings, the satan was usually depicted as having human form, but with wings and black skin or hair.

In the twelfth and thirteenth centuries

In fashion, black didn't have the prestige of red, the colour of the nobility. It was worn by Benedictine monks as a sign of humility and penitence. In the twelfth century a famous theological dispute broke out between the Cistercian monks, who wore white, and the Benedictines, who wore black. A Benedictine abbot, Pierre the Venerable, accused the Cistercians of excessive pride in wearing white instead of black. Saint Bernard of Clairvaux, the founder of the Cistercians responded that black was the colour of the devil, hell, "of death and sin," while white represented "purity, innocence and all the virtues".

Black symbolised both power and secrecy in the mediaeval world. The emblem of the Holy Roman Empire of Germany was a black eagle. The black knight in the poetry of the Middle Ages was an enigmatic figure, hiding his identity, usually wrapped in secrecy.

Black ink, invented in Ancient China and India, was traditionally used in the Middle Ages for writing, for the simple reason that black was the darkest colour and therefore provided the greatest contrast with white paper or parchment, making it the easiest colour to read. It became even more important in the fifteenth century, with the invention of printing. A new kind of ink, printer's ink, was created out of soot, turpentine and walnut oil. The new ink made it possible to spread ideas to a mass audience through printed books, and to popularise art through black and white engravings and prints. Because of its contrast and clarity, black ink on white paper continued to be the standard for printing books, newspapers and documents; and for the same reason black text on a white background is the most common format used on computer screens.

In the fourteenth and fifteenth centuries

In the early Middle Ages, princes, nobles and the wealthy usually wore bright colors, particularly scarlet cloaks from Italy. Black was rarely part of the wardrobe of a noble family. The one exception was the fur of the sable. This glossy black fur, from an animal of the marten family, was the finest and most expensive fur in Europe. It was imported from Russia and Poland and used to trim the robes and gowns of royalty.

In the fourteenth century, the status of black began to change. First, high-quality black dyes began to reach on the market, allowing garments of a deep, rich black. Magistrates and government officials began to wear black robes, as a sign of the importance and seriousness of their positions. A third reason was the passage of sumptuary laws in a few parts of Europe which prohibited the wearing of costly clothes and certain colours by anyone except members of the nobility. The famous bright scarlet cloaks from Venice and the peacock blue fabrics from Florence were restricted to the nobility. The wealthy bankers and merchants of northern Italy responded by changing to black robes and gowns, made with the most expensive fabrics.

The change to the more austere but elegant black was quickly picked up by the kings and nobility. It began in northern Italy, where the Duke of Milan and the Count of Savoy and the rulers of Mantua, Ferrara, Rimini and Urbino began to dress in black. It then spread to France, led by Louis I, Duke of Orleans, younger brother of King Charles VI of France. It moved to England at the end of the reign of King Richard II (1377–1399), where all the court began to wear black. In 1419–20, black became the colour of the powerful Duke of Burgundy, Philip the Good. It moved to Spain, where it became the colour of the Spanish Habsburgs, of Charles V and of his son, Philip II of Spain (1527–1598). European rulers saw it as the colour of power, dignity, humility and temperance. By the end of the sixteenth century, it was the colour worn by almost all the monarchs of Europe and their courts.

Modern history

In the sixteenth and seventeenth centuries

While black was the colour worn by the Catholic rulers of Europe, it was additionally the emblematic colour of the Protestant Reformation in Europe and the Puritans in England and America. Jean Calvin, Melanchton and additional Protestant theologians denounced the richly coloured and decorated interiors of Roman Catholic churches. They saw the colour red, worn by the Pope and his Cardinals, as the colour of luxury, sin, and human folly. In a few northern European cities, mobs attacked churches and cathedrals, smashed the stained glass windows and defaced the statues and decoration. In Protestant doctrine, clothing was required to be sober, simple and discreet. Bright colours were banished and replaced by blacks, browns and grays; women and children were recommended to wear white.

In the Protestant Netherlands, Rembrandt Van Rijn used this sober new palette of blacks and browns to create portraits whose faces emerged from the shadows expressing the deepest human emotions. The Catholic painters of the Counter-Reformation, like Rubens, went in the opposite direction; they filled their paintings with bright and rich colors. The new Baroque churches of the Counter-Reformation were usually shining white inside and filled with statues, frescoes, marble, gold and colourful paintings, to appeal to the public. But European Catholics of all classes, like Protestants, eventually adopted a sober wardrobe that was mostly black, brown and gray.

In the second part of the seventeenth century, Europe and America experienced an epidemic of fear of witchcraft. People widely believed that the satan appeared at midnight in a ceremony called a black mass or black sabbath, usually in the form of a black animal, often a goat, a dog, a wolf, a bear, a deer or a rooster, accompanied by their familiar spirits, black cats, serpents and additional black creatures. This was the origin of the widespread superstition about black cats and additional black animals. In Medieval Flanders, in a ceremony called Kattenstoet, black cats were thrown from the belfry of the Cloth Hall of Ypres to ward off witchcraft.

Witch trials were common in both Europe and America throughout this period. During the notorious Salem witch trials in New England in 1692–93, one of those on trial was accused of being able turn into a "black thing with a blue cap," and others of having familiars in the form of a black dog, a black cat and a black bird. Nineteen women and men were hanged as witches.

In the eighteenth and nineteenth centuries

In the eighteenth century, throughout the European Age of Enlightenment, black receded as a fashion color. Paris became the fashion capital, and pastels, blues, greens, yellow and white became the colours of the nobility and upper classes. But after the French Revolution, black again became the dominant color.

Black was the colour of the industrial revolution, largely fueled by coal, and later by oil. Thanks to coal smoke, the buildings of the large cities of Europe and America gradually turned black. By 1846 the industrial area of the West Midlands of England was "commonly called 'the Black Country'”. Charles Dickens and additional writers described the dark streets and smoky skies of London, and they were vividly illustrated in the engravings of French artist Gustave Doré.

A different kind of black was an important part of the romantic movement in literature. Black was the colour of melancholy, the dominant theme of romanticism. The novels of the period were filled with castles, ruins, dungeons, storms, and meetings at midnight. The leading poets of the movement were usually portrayed dressed in black, usually with a white shirt and open collar, and a scarf carelessly over their shoulder, Percy Bysshe Shelley and Lord Byron helped create the enduring stereotype of the romantic poet.

The invention of new, inexpensive synthetic black dyes and the industrialization of the textile industry meant that good-quality black clothes were available for the first time to the general population. In the nineteenth century gradually black became the most popular colour of business dress of the upper and middle classes in England, the Continent, and America.

Black dominated literature and fashion in the nineteenth century, and played a large role in painting. James McNeil Whistler made the colour the subject of his most famous painting, Arrangement in grey and black number one (1871), better known as Whistler's Mother.

Some 19th-century French painters had a low opinion of black: "Reject black," Paul Gauguin said, "and that mix of black and white they call gray. Nothing is black, nothing is gray." But Édouard Manet used blacks for their strength and dramatic effect. Manet's portrait of painter Berthe Morisot was a study in black which perfectly captured her spirit of independence. The black gave the painting power and immediacy; he even changed her eyes, which were green, to black to strengthen the effect. Henri Matisse quoted the French impressionist Pissarro telling him, "Manet is stronger than us all - he made light with black."

Pierre-Auguste Renoir used luminous blacks, especially in his portraits. When someone told him that black wasn't a color, Renoir replied: "What makes you think that? Black is the queen of colors. I always detested Prussian blue. I tried to replace black with a mixture of red and blue, I tried using cobalt blue or ultramarine, but I always came back to ivory black."

Vincent van Gogh used black lines to outline a large number of of the objects in his paintings, such as the bed in the famous painting of his bedroom. making them stand apart. His painting of black crows over a cornfield, painted shortly before he died, was particularly agitated and haunting.

In the late nineteenth century, black additionally became the colour of anarchism. (See political movements.)

In the twentieth and twenty-first centuries

In the twentieth century, black was the colour of Italian and German fascism. (See political movements.)

In art, black regained a few of the territory that it had lost throughout the nineteenth century. The Russian painter Kasimir Malevich, a member of the Suprematist movement, created the Black Square in 1915, is widely considered the first purely abstract painting. He wrote, "The painted work is no longer simply the imitation of reality, but is this quite reality ... It isn't a demonstration of ability, but the materialisation of an idea."

Black was additionally appreciated by Henri Matisse. "When I didn't know what colour to put down, I put down black," he said in 1945. "Black is a force: I used black as ballast to simplify the construction ... Since the impressionists it seems to have made continuous progress, taking a more and more important part in colour orchestration, comparable to that of the double bass as a solo instrument."

In the 1950s, black came to be a symbol of individuality and intellectual and social rebellion, the colour of those who didn't accept established norms and values. In Paris, it was worn by Left-Bank intellectuals and performers such as Juliette Greco, and by a few members of the Beat Movement in New York and San Francisco. Black leather jackets were worn by motorcycle gangs such as the Hells Angels and street gangs on the fringes of society in the United States. Black as a colour of rebellion was celebrated in such films as The Wild One, with Marlon Brando. By the end of the twentieth century, black was the emblematic colour of the punk subculture punk fashion, and the goth subculture. Goth fashion, which emerged in England in the 1980s, was inspired by Victorian era mourning dress.

In men's fashion, black gradually ceded its dominance to navy blue, particularly in business suits. Black evening dress and formal dress in general were worn less and less. In 1960, John F. Kennedy was the last American President to be inaugurated wearing formal dress; President Lyndon Johnson and all his successors were inaugurated wearing business suits.

Women's fashion was revolutionised and simplified in 1926 by the French designer Coco Chanel, who published a drawing of a simple black dress in Vogue magazine. She famously said, "A woman needs just three things; a black dress, a black sweater, and, on her arm, a man she loves." Other designers contributed to the trend of the little black dress. The Italian designer Gianni Versace said, "Black is the quintessence of simplicity and elegance," and French designer Yves Saint Laurent said, "black is the liaison which connects art and fashion. One of the most famous black dresses of the century was designed by Hubert de Givenchy and was worn by Audrey Hepburn in the 1961 film Breakfast at Tiffany's.

The American Civil Rights Movement in the 1950s was a struggle for the political equality of African Americans. It developed into the Black Power movement in the late 1960s and 1970s, and popularised the slogan "Black is Beautiful".

In the 1990s, the Black Standard became the banner of several Islamic extremist, jihadist groups. (See political movements.)

Science

Optics

In the visible spectrum, black is the absorption of all colors.

Black can be defined as the visual impression experienced when no visible light reaches the eye. Pigments or dyes that absorb light rather than reflect it back to the eye "look black". A black pigment can, however, result from a combination of several pigments that collectively absorb all colors. If appropriate proportions of three primary pigments are mixed, the result reflects so little light as to be called "black".

This provides two superficially opposite but actually complementary descriptions of black. Black is the absorption of all colours of light, or an exhaustive combination of multiple colours of pigment. See additionally primary colors.

In physics, a black body is a perfect absorber of light, but, by a thermodynamic rule, it is additionally the best emitter. Thus, the best radiative cooling, out of sunlight, is by using black paint, though it is important that it be black (a nearly perfect absorber) in the infrared as well.

In elementary science, far ultraviolet light is called "black light" because, while itself unseen, it causes a large number of minerals and additional substances to fluoresce.

On January 16, 2008, researchers from Troy, New York's Rensselaer Polytechnic Institute announced the creation of the then darkest material on the planet. The material, which reflected only 0.045 percent of light, was created from carbon nanotubes stood on end. This is 1/30 of the light reflected by the current standard for blackness, and one third the light reflected by the previous record holder for darkest substance. As of February 2016, the current darkest material known is claimed to be Vantablack.

A material is said to be black if most incoming light is absorbed equally in the material. Light (electromagnetic radiation in the visible spectrum) interacts with the atoms and molecules, which causes the energy of the light to be converted into additional forms of energy, usually heat. This means that black surfaces can act as thermal collectors, absorbing light and generating heat(see Solar thermal collector).

Absorption of light is contrasted by transmission, reflection and diffusion, where the light is only redirected, causing objects to seem transparent, reflective or white respectively.

Chemistry of black pigments, dyes, and inks

Pigments

The earliest pigments used by Neolithic man were charcoal, red ocher and yellow ocher. The black lines of cave art were drawn with the tips of burnt torches made of a wood with resin.

Different charcoal pigments were made by burning different woods and animal products, each of which produced a different tone. The charcoal would be ground and then mixed with animal fat to make the pigment.

  • Vine black was produced in Roman times by burning the cut branches of grapevines. It could additionally be produced by burning the remains of the crushed grapes, which were collected and dried in an oven. According to the historian Vitruvius, the deepness and richness of the black produced corresponded to the quality of the wine. The finest wines produced a black with a bluish tinge the colour of indigo.

The 15th-century painter Cennino Cennini described how this pigment was made throughout the Renaissance in his famous handbook for artists: "...there is a black which is made from the tendrils of vines. And these tendrils need to be burned. And when they have been burned, throw a few water onto them and put them out and then mull them in the same way as the additional black. And this is a lean and black pigment and is one of the perfect pigments that we use."

Cennini additionally noted that "There is another black which is made from burnt almond shells or peaches and this is a perfect, fine black." Similar fine blacks were made by burning the pits of the peach, cherry or apricot. The powdered charcoal was then mixed with gum arabic or the yellow of an egg to make a paint.

Different civilizations burned different plants to produce their charcoal pigments. The Inuit of Alaska used wood charcoal mixed with the blood of seals to paint masks and wooden objects. The Polynesians burned coconuts to produce their pigment.

  • Lamp black was used as a pigment for painting and frescoes. as a dye for fabrics, and in a few societies for making tattoos. The fifteenth century Florentine painter Cennino Cennini described how it was made throughout the Renaissance: "... take a lamp full of linseed oil and fill the lamp with the oil and light the lamp. Then place it, lit, under a thoroughly clean pan and make sure that the flame from the lamp is two or three fingers from the bottom of the pan. The smoke that comes off the flame will hit the bottom of the pan and gather, fitting thick. Wait a bit. take the pan and brush this pigment (that is, this smoke) onto paper or into a pot with something. And it isn't necessary to mull or grind it because it is a quite fine pigment. Re-fill the lamp with the oil and put it under the pan like this several times and, in this way, make as much of it as is necessary." This same pigment was used by Indian artists to paint the Ajanta Caves, and as dye in ancient Japan.
  • Ivory black, additionally known as bone char, was originally produced by burning ivory and mixing the resulting charcoal powder with oil. The colour is still made today, but ordinary animal bones are substituted for ivory.
  • Mars black is a black pigment made of synthetic iron oxides. It is commonly used in water-colors and oil painting. It takes its name from Mars, the god of war and patron of iron.

Dyes

Good-quality black dyes weren't known until the middle of the fourteenth century. The most common early dyes were made from bark, roots or fruits of different trees; usually the walnut, chestnut, or certain oak trees. The blacks produced were often more gray, brown or bluish. The cloth had to be dyed several times to darken the color. One solution used by dyers was add to the dye a few iron filings, rich in iron oxide, which gave a deeper black. An Additional was to first dye the fabric dark blue, and then to dye it black.

A much richer and deeper black dye was eventually found made from the Oak apple or gall-nut. The gall-nut is a small round tumour which grows on oak and additional varieties of trees. They range in size from 2–5 cm, and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. The dye was quite expensive; a great quantity of gall-nuts were needed for a quite small amount of dye. The gall-nuts which made the best dye came from Poland, eastern Europe, the near east and North Africa. Beginning in about the fourteenth century, dye from gall-nuts was used for clothes of the kings and princes of Europe.

Another important source of natural black dyes from the seventeenth century onwards was the logwood tree, or Haematoxylum campechianum, which additionally produced reddish and bluish dyes. It is a species of flowering tree in the legume family, Fabaceae, that's native to southern Mexico and northern Central America. The modern nation of Belize grew from seventeenth century English logwood logging camps.

Since the mid-19th century, synthetic black dyes have largely replaced natural dyes. One of the important synthetic blacks is Nigrosin, a mixture of synthetic black dyes (CI 50415, Solvent black 5) made by heating a mixture of nitrobenzene, aniline and aniline hydrochloride in the presence of a copper or iron catalyst. Its main industrial uses are as a colourant for lacquers and varnishes and in marker-pen inks.

Inks

The first known inks were made by the Chinese, and date back to the twenty-third century B.C. They used natural plant dyes and minerals such as graphite ground with water and applied with an ink brush. Early Chinese inks similar to the modern inkstick have been found dating to about 256 BC at the end of the Warring States period. They were produced from soot, usually produced by burning pine wood, mixed with animal glue. To make ink from an inkstick, the stick is continuously ground against an inkstone with a small quantity of water to produce a dark liquid which is then applied with an ink brush. Artists and calligraphists could vary the thickness of the resulting ink by reducing or increasing the intensity and time of ink grinding. These inks produced the delicate shading and subtle or dramatic effects of Chinese brush painting.

India ink (or Indian ink in British English) is a black ink once widely used for writing and printing and now more commonly used for drawing, especially when inking comic books and comic strips. The technique of making it probably came from China. India ink has been in use in India after at least the fourth century BC, where it was called masi. In India, the black colour of the ink came from bone char, tar, pitch and additional substances.

The Ancient Romans had a black writing ink they called Atramentum librarium. Its name came from the Latin word atrare, which meant to make something black. (This was the same root as the English word atrocious.) It was usually made, like India ink, from soot, although one variety, called atrementum elaphantinum, was made by burning the ivory of elephants.

Gall-nuts were additionally used for making fine black writing ink. Iron gall ink (also known as iron gall nut ink or oak gall ink) was a purple-black or brown-black ink made from iron salts and tannic acids from gall nut. It was the standard writing and drawing ink in Europe, from about the twelfth century to the nineteenth century, and remained in use well into the twentieth century.

Astronomy

  • A black dwarf is a hypothetical stellar remnant, created when a white dwarf becomes sufficiently cool to no longer emit significant heat or light. Since the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.8 billion years), no black dwarfs are thought to exist yet in the universe.
  • A black hole is a region of spacetime where gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there's a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Black holes of stellar mass are expected to form when quite massive stars collapse at the end of their life cycle. After a black hole has formed it can continue to grow by absorbing mass from its surroundings. By absorbing additional stars and merging with additional black holes, supermassive black holes of millions of solar masses might form. There is general consensus that supermassive black holes exist in the centres of most galaxies. Although a black hole itself is black, infalling material forms an accretion disk, which is one of brightest types of object in the universe.
  • Black-body radiation refers to the radiation coming from a body at a given temperature where all incoming energy (light) is converted to heat.
  • Black sky refers to the appearance of space as one emerges from Earth's atmosphere.

Why the night sky and space are black – Olbers' paradox

The fact that outer space is black is at times called Olbers' paradox. In theory, after the universe is full of stars, and is believed to be infinitely large, it would be expected that the light of an infinite number of stars would be enough to brilliantly light the whole universe all the time. Notwithstanding the background colour of outer space is black. This contradiction was first noted in 1823 by German astronomer Heinrich Wilhelm Matthias Olbers, who posed the question of why the night sky was black.

The current accepted answer is that, while the universe is infinitely large, it isn't infinitely old. It is thought to be about 15 billion years old, so we can only see objects as far away as the distance light can travel in 15 billion years. Light from stars farther away hasn't reached Earth, and can't contribute to making the sky bright. Also, as the universe is expanding, a large number of stars are moving away from Earth. As they move, the wavelength of their light becomes longer, through the Doppler effect, and shifts toward red, or even becomes invisible. As a result of these two phenomena, there isn't enough starlight to make space anything but black.

The daytime sky on Earth is blue because the light from the Sun strikes molecules in Earth's atmosphere and scatters in all directions. Blue light is scattered more than additional colors, and reaches the eye in greater quantities, making the daytime sky look blue. This is known as Rayleigh scattering.

The nighttime sky on Earth is black because the part of Earth experiencing night is facing away from the Sun, the light of the Sun is blocked by Earth itself, and there's no additional bright nighttime source of light in the vicinity. Thus, there isn't enough light to undergo Rayleigh scattering and make the sky blue. On the Moon, on the additional hand, because there's no atmosphere to scatter the light, the sky is black both day and night. This additionally holds true for any additional location without an atmosphere.

Biology

Political movements

Anarchism is a political philosophy, most popular in the late nineteenth and early twentieth centuries, which holds that governments and capitalism are harmful and undesirable. The symbols of anarchism was usually either a black flag or a black letter A. More recently it is usually represented with a bisected red and black flag, to emphasise the movement's socialist roots in the First International. Anarchism was most popular in Spain, France, Italy, Ukraine and Argentina. There were additionally small but influential movements in the United States and Russia. In the latter, the movement initially allied itself with the Bolsheviks.

The Black Army was a collection of anarchist military units which fought in the Russian Civil War, at times on the side of the Bolshevik Red Army, and at times for the opposing White Army. It was officially known as the Revolutionary Insurrectionary Army of Ukraine, and it was under the command of the famous anarchist Nestor Makhno.

Fascism. The Blackshirts (Italian: camicie nere, 'CCNN) were Fascist paramilitary groups in Italy throughout the period immediately following World War I and until the end of World War II. The Blackshirts were officially known as the Voluntary Militia for National Security (Milizia Volontaria per la Sicurezza Nazionale, or MVSN).

Inspired by the black uniforms of the Arditi, Italy's elite storm troops of World War I, the Fascist Blackshirts were organised by Benito Mussolini as the military tool of his political movement. They used violence and intimidation against Mussolini's opponents. The emblem of the Italian fascists was a black flag with fasces, an axe in a bundle of sticks, an ancient Roman symbol of authority. Mussolini came to power in 1922 through his March on Rome with the blackshirts.

Black was additionally adopted by Adolf Hitler and the Nazis in Germany. Red, white and black were the colours of the flag of the German Empire from 1870 to 1918. In Mein Kampf, Hitler explained that they were "revered colours expressive of our homage to the glorious past." Hitler additionally wrote that "the new flag ... should prove effective as a large poster" because "in hundreds of thousands of cases a really striking emblem might be the first cause of awakening interest in a movement." The black swastika was meant to symbolise the Aryan race, which, according to the Nazis, "was always anti-Semitic and will always be anti-Semitic." Several designs by a number of different authors were considered, but the one adopted in the end was Hitler's personal design. Black became the colour of the uniform of the SS, the Schutzstaffel or "defense corps", the paramilitary wing of the Nazi Party, and was worn by SS officers from 1932 until the end of World War II.

The Nazis used a black triangle to symbolise anti-social elements. The symbol originates from Nazi concentration camps, where every prisoner had to wear one of the Nazi concentration camp badges on their jacket, the colour of which categorised them according to "their kind." Many Black Triangle prisoners were either mentally disabled or mentally ill. The homeless were additionally included, as were alcoholics, the Romani people, the habitually "work-shy," prostitutes, draught dodgers and pacifists. More recently the black triangle has been adopted as a symbol in lesbian culture and by disabled activists.

Black shirts were additionally worn by the British Union of Fascists before World War II, and members of fascist movements in the Netherlands.

Patriotic Resistance. The Lützow Free Corps, composed of volunteer German students and academics fighting against Napoleon in 1813, couldn't afford to make special uniforms and therefore adopted black, as the only colour that can be used to dye their civilian clothing without the original colour showing. In 1815 the students began to carry a red, black and gold flag, which they believed (incorrectly) had been the colours of the Holy Roman Empire (the imperial flag had actually been gold and black). In 1848, this banner became the flag of the German confederation. In 1866, Prussia unified Germany under its rule, and imposed the red, white and black of its own flag, which remained the colours of the German flag until the end of the Second World War. In 1949 the Federal Republic of Germany returned to the original flag and colours of the students and professors of 1815, which is the flag of Germany today.

Islamism. The Black Standard (راية السوداء rāyat al-sawdā' , additionally known as راية العقاب rāyat al-'uqāb "banner of the eagle" or simply as الراية al-rāya "the banner") is the historical flag flown by Muhammad in Islamic tradition, an eschatological symbol in Shi'a Islam (heralding the advent of the Mahdi), and a symbol used in Islamism and Jihadism.

Selected flags containing black

Religion

  • In Christian theology, black was the colour of the universe before God created light. In a large number of religious cultures, from Mesoamerica to Oceania to India and Japan, the world was created out of a primordial darkness. In the Bible the light of faith and Christianity is often contrasted with the darkness of ignorance and paganism.

In Christianity, the devil is often called the "prince of darkness." The term was used in John Milton's poem Paradise Lost, published in 1667, referring to Satan, who's viewed as the embodiment of evil. It is an English translation of the Latin phrase princeps tenebrarum, which occurs in the Acts of Pilate, written in the fourth century, in the 11th-century hymn Rhythmus de die mortis by Pietro Damiani, and in a sermon by Bernard of Clairvaux from the twelfth century. The phrase additionally occurs in King Lear by William Shakespeare (c. 1606), Act III, Scene IV, l. 14: 'The prince of darkness is a gentleman."

Priests and pastors of the Roman Catholic, Eastern Orthodox and Protestant churches commonly wear black, as do monks of the Benedictine Order, who consider it the colour of humility and penitence.

  • In Islam, black, along with green, plays an important symbolic role. It is the colour of the Black Standard, the banner that's said to have been carried by the soldiers of Muhammad. It is additionally used as a symbol in Shi'a Islam (heralding the advent of the Mahdi), and the flag of followers of Islamism and Jihadism.
  • In Hinduism, the goddess Kali, goddess of time and change, is portrayed with black or dark blue skin. wearing a necklace adorned with severed heads and hands. Her name means "The black one". She destroys anger and passion according to Hindu mythology and her devotees are supposed to abstain from meat or intoxication. Kali doesn't eat meat, but it is the śāstra's injunction that those who're unable to give up meat-eating, they might sacrifice one goat, not cow, one small animal before the goddess Kali, on amāvāsya (new moon) day, night, not day, and they can eat it.

Sports

  • The national rugby union team of New Zealand is called the All Blacks, in reference to their black outfits, and the colour is additionally shared by additional New Zealand national teams such as the Black Caps (cricket) and the Kiwis (rugby league).
  • Association football (soccer) referees traditionally wear all-black uniforms, however nowadays additional uniform colours might additionally be worn.
  • In auto racing, a black flag signals a driver to go into the pits.
  • In baseball, "the black" refers to the batter's eye, a blacked out area around the center-field bleachers, painted black to give hitters a decent background for pitched balls.
  • A large number of teams have uniforms designed with black colors—many feeling the colour at times imparts a psychological advantage in its wearers. Black is used by numerous professional and collegiate sports teams:
Association football
Major League Baseball
National Basketball Association
National Football League
National Hockey League
Collegiate Teams

Associations and symbolism

Mourning

In Europe and America, black is the colour most commonly associated with mourning and bereavement. It is the colour traditionally worn at funerals and memorial services. In a few traditional societies, for example in Greece and Italy, a few widows wear black for the rest of their lives. In contrast, across much of Africa and parts of Asia like Vietnam, white is a colour of mourning and is worn throughout funerals.

In Victorian England, the colours and fabrics of mourning were specified in an unofficial dress code: "non-reflective black paramatta and crape for the first year of deepest mourning, followed by nine months of dullish black silk, heavily trimmed with crape, and then three months when crape was discarded. Paramatta was a fabric of combined silk and wool or cotton; crape was a harsh black silk fabric with a crimped appearance produced by heat. Widows were allowed to change into the colours of half-mourning, such as grey and lavender, black and white, for the final six months."

A "black day" (or week or month) usually refers to tragic date. The Romans marked fasti days with white stones and nefasti days with black. The term is often used to remember massacres. Black months include the Black September in Jordan, when large numbers of Palestinians were killed, and Black July in Sri Lanka, the killing of members of the Tamil population by the Sinhalese government.

In the financial world, the term often refers to a dramatic drop in the stock market. For example, the Wall Street Crash of 1929, the stock market crash on October 29, 1929, which marked the start of the Great Depression, is nicknamed Black Tuesday, and was preceded by Black Thursday, a downturn on October 24 the previous week.

Darkness and evil

In western popular culture, black has long been associated with evil and darkness. It is the traditional colour of witchcraft and black magic.

In the Book of Revelation, the last book in the New Testament of the Bible, the Four Horsemen of the Apocalypse are supposed to announce the Apocalypse before the Last Judgment. The horseman representing famine rides a black horse.

The vampire of literature and films, such as Count Dracula of the Bram Stoker novel, dressed in black, and could only move at night. The Wicked Witch of the West in the 1939 film The Wizard of Oz became the archetype of witches for generations of children. Whereas witches and sorcerers inspired real fear in the seventeenth century, in the twenty-first century children and adults dressed as witches for Halloween parties and parades.

Power, authority, and solemnity

Black is frequently used as a colour of power, law and authority. In a large number of countries judges and magistrates wear black robes. That custom began in Europe in the thirteenth and fourteenth centuries. Jurists, magistrates and certain additional court officials in France began to wear long black robes throughout the reign of Philip IV of France (1285–1314), and in England from the time of Edward I (1271–1307). The custom spread to the cities of Italy at about the same time, between 1300 and 1320. The robes of judges resembled those worn by the clergy, and represented the law and authority of the King, while those of the clergy represented the law of God and authority of the church.

Until the twentieth century most police uniforms were black, until they were largely replaced by a less menacing blue in France, the U.S. and additional countries. In the United States, police cars are frequently Black and white. The riot control units of the Basque Autonomous Police in Spain are known as beltzak ("blacks") after their uniform.

Black today is the most common colour for limousines and the official cars of government officials.

Black evening dress is still worn at a large number of solemn occasions or ceremonies, from graduations to formal balls. Graduation gowns are copied from the gowns worn by university professors in the Middle Ages, which in turn were copied from the robes worn by judges and priests, who often taught at the early universities. The mortarboard hat worn by graduates is adapted from a square cap called a biretta worn by Medieval professors and clerics

Military

Black has been a traditional colour of cavalry and armoured or mechanised troops. German armoured troops (Panzerwaffe) traditionally wore black uniforms, and even in others, a black beret is common. In Finland, black is the symbolic colour for both armoured troops and combat engineers, and military units of these specialities have black flags and unit insignia.

The black beret and the colour black is additionally a symbol of special forces in a large number of countries. Soviet and Russian OMON special police and Russian naval infantry wear a black beret. A black beret is additionally worn by military police in the Canadian, Czech, Croatian, Portuguese, Spanish and Serbian armies.

The silver-on-black skull and crossbones symbol or Totenkopf and a black uniform were used by Hussars and Black Brunswickers, the German Panzerwaffe and the Nazi Schutzstaffel, and U.S. 400th Missile Squadron (crossed missiles), and continues in use with the Estonian Kuperjanov Battalion.

Functionality

In the nineteenth and twentieth centuries, a large number of machines and devices, large and small, were painted black, to stress their functionality. These included telephones, sewing machines, steamships, railroad locomotives, and automobiles. The Ford Model T, the first mass-produced car, was available only in black from 1914 to 1926. Of means of transportation, only aeroplanes were rarely ever painted black.

Race and color

  • The term "black" is often used in the West to describe people whose skin is darker. In the United States, it is particularly used to describe African Americans. The terms for African Americans have changed over the years, as shown by the categories in the United States Census, taken every ten years.
  • In the first U.S. Census, taken in 1790, just four categories were used: Free White males, Free White females, additional free persons, and slaves.
  • In the 1820 census the new category "colored" was added.
  • In the 1850 census, slaves were listed by owner, and a B indicated black, while an M indicated "mulatto."
  • In the 1890 census, the categories for race were white, black, mulatto, quadroon (a person one-quarter black); octoroon (a person one-eighth black), Chinese, Japanese, or American Indian.
  • In the 1930 census, anyone with any black blood was supposed to be listed as "Negro."
  • In the 1970 census, the category "Negro or black" was used for the first time.
  • In the 2000 and 2012 census, the category "Black or African-American" was used, defined as "a person having their origin in any of the racial groups in Africa." In the 2012 Census 12.1 percent of Americans identified themselves as Black or African-American.

Black is additionally commonly used as a racial description in the United Kingdom, after ethnicity was first measured in the 2001 census. The 2011 British census asked residents to describe themselves, and categories offered included Black, African, Caribbean, or Black British. Other possible categories were African British, African Scottish, Caribbean British and Caribbean Scottish. Of the total UK population in 2001, 1.01 percent identified themselves as Black Caribbean, .8 percent as Black African, and .2 percent as Black (others).

In Canada, census respondents can identify themselves as Black. In the 2006 census, 2.5 percent of the population identified themselves as black.

In Australia, the term black isn't used in the census. In the 2006 census, 2.3 percent of Australians identified themselves as Aboriginal and/or Torres Strait Islanders.

In Brazil, the Brazilian Institute of Geography and Statistics (IBGE) asks people to identify themselves as branco (white), pardo (brown), preto (black), or amarelo (yellow). In 2008 6.84 percent of the population identified themselves as "preto".

Black and white

  • Black and white have often been used to describe opposites; particularly light and darkness and good and evil. In Medieval literature, the white knight usually represented virtue, the black knight something mysterious and sinister. In American westerns, the hero often wore a white hat, the villain a black hat.
  • In the original game of chess invented in Persia or India, the colours of the two sides were varied; a 12th-century Iranian chess set in the New York Metropolitan Museum of Art, has red and green pieces. But when the game was imported into Europe, the colors, corresponding to European culture, usually became black and white.
  • Studies have shown that something printed in black letters on white has more authority with readers than any additional colour of printing.
  • In philosophy and arguments, the issue is often described as black-and-white, meaning that the issue at hand is dichotomized (having two clear, opposing sides with no middle ground).

Black chambers and black ops

Black is commonly associated with secrecy.

  • The Black Chamber was a term given to an office which secretly opened and read diplomatic mail and broke codes. Queen Elizabeth I had such an office, headed by her Secretary, Sir Francis Walsingham, which successfully broke the Spanish codes and broke up several plots against the Queen. In France a cabinet noir was established inside the French post office by Louis XIII to open diplomatic mail. It was closed throughout the French Revolution but re-opened under Napoleon I. The Habsburg Empire and Dutch Republic had similar black chambers.
  • The United States created a secret peacetime Black Chamber, called the Cipher Bureau, in 1919. It was funded by the State Department and Army and disguised as a commercial company in New York. It successfully broke a number of diplomatic codes,including the code of the Japanese government. It was closed down in 1929 after the State Department withdrew funding, when the new Secretary of State, Henry Stimson, stated that "Gentlemen don't read each other's mail." The Cipher Bureau was the ancestor of the U.S. National Security Agency.
  • A black project is a secret military project, such as Enigma Decryption throughout the World II, or a secret counter-narcotics or police sting operation.
  • Black ops are covert operations carried out by a government, government agency or military.

Elegance – black and fashion

Black is the colour most commonly associated with elegance in Europe and the United States, followed by silver, gold, and white.

Black first became a fashionable colour for men in Europe in the seventeenth century, in the courts of Italy and Spain. (See history above). In the nineteenth century, it was the fashion for men both in business and for evening wear, in the form of a black coat whose tails came down the knees. In the evening it was the custom of the men to leave the women after dinner to go to a special smoking room to enjoy cigars or cigarettes. This meant that their tailcoats eventually smelled of tobacco. According to the legend, in 1865 Edward VII, then the Prince of Wales, had his tailor make a special short smoking jacket. The smoking jacket then evolved into the dinner jacket. Again according to legend, the first Americans to wear the jacket were members of the Tuxedo Club in New York State. Thereafter the jacket became known as a tuxedo in the U.S. The term "smoking" is still used today in Russia and additional countries. The tuxedo was always black until the 1930s, when the Duke of Windsor began to wear a tuxedo that was a quite dark midnight blue. He did so because a black tuxedo looked greenish in artificial light, while a dark blue tuxedo looked blacker than black itself.

For women's fashion, the defining moment was the invention of the simple black dress by Coco Chanel in 1926. (See history.) Thereafter, a long black gown was used for formal occasions, while the simple black dress can be used for everything else. The designer Karl Lagerfeld, explaining why black was so popular, said: "Black is the colour that goes with everything. If you're wearing black, you're on sure ground." Skirts have gone up and down and fashions have changed, but the black dress hasn't lost its position as the essential element of a woman's wardrobe. The fashion designer Christian Dior said, "elegance is a combination of distinction, naturalness, care and simplicity," and black exemplified elegance.

The expression "X is the new black" is a reference to the latest trend or fad that's considered a wardrobe basic for the duration of the trend, on the basis that black is always fashionable. The phrase has taken on a life of its own and has become a cliché.

Many performers of both popular and European classical music, including French singers Edith Piaf and Juliette Greco, and violinist Joshua Bell have traditionally worn black on stage throughout performances. A black costume was usually chosen as part of their image or stage persona, or because it didn't distract from the music, or at times for a political reason. Country-western singer Johnny Cash always wore black on stage. In 1971, Cash wrote the song "Man in Black" to explain why he dressed in that color: "We're doing mighty fine I do suppose / In our streak of lightning cars and fancy clothes / But just so we're reminded of the ones who're held back / Up front there ought to be a man in black."

Asian culture

In China, the colour black is associated with water, one of the five fundamental elements believed to compose all things; and with winter, cold, and the direction north, usually symbolised by a black tortoise. It is additionally associated with disorder, including the positive disorder which leads to change and new life. When the first Emperor of China Qin Shi Huang seized power from the Zhou Dynasty, he changed the Imperial colour from red to black, saying that black extinguished red. Only when the Han Dynasty appeared in 206 AD was red restored as the imperial color.

The Chinese and Japanese character for black (kuro in Japanese), can, depending upon the context, additionally mean dark or evil.

In Japan, black is associated with mystery, the night, the unknown, the supernatural, the invisible and death. Combined with white, it can symbolise intuition.

In Japan in the tenth and eleventh century, it was believed that wearing black could bring misfortune. It was worn at court by those who wanted to set themselves apart from the established powers or who had renounced material possessions.

In Japan black can additionally symbolise experience, as opposed to white, which symbolises naiveté. The black belt in martial arts symbolises experience, while a white belt is worn by novices. Japanese men traditionally wear a black kimono with a few white decoration on their wedding day.

In Indonesia black is associated with depth, the subterranean world, demons, disaster, and the left hand. When black is combined with white, however, it symbolises harmony and equilibrium.

Idioms and expressions

Namesake of the idiom "black sheep"
  • In the United States, "Black Friday" (the day after Thanksgiving Day, the fourth Thursday in November) is traditionally the busiest shopping day of the year. Many Americans are on holiday because of Thanksgiving, and a large number of retailers open earlier and close later than normal, and offer special prices. The day's name originated in Philadelphia sometime before 1961, and originally was used to describe the heavy and disruptive downtown pedestrian and vehicle traffic which would occur on that day. Later an alternative explanation began to be offered: that "Black Friday" indicates the point in the year that retailers begin to turn a profit, or are "in the black", because of the large volume of sales on that day.
  • "In the black" means profitable. Accountants originally used black ink in ledgers to indicate profit, and red ink to indicate a loss.
  • Black Friday additionally refers to an particularly disastrous day on financial markets. The first Black Friday (1869), September 24, 1869, was caused by the efforts of two speculators, Jay Gould and James Fisk, to corner the gold market on the New York Gold Exchange.
  • A blacklist is a list of undesirable persons or entities (to be placed on the list is to be "blacklisted").
  • Black comedy is a form of comedy dealing with morbid and serious topics. The expression is similar to black humor or black humour.
  • A black mark against a person relates to something bad they have done.
  • A black mood is a bad one (cf Winston Churchill's clinical depression, which he called "my black dog").
  • Black market is used to denote the trade of illegal goods, or alternatively the illegal trade of otherwise legal items at considerably higher prices, e.g. to evade rationing.
  • Black propaganda is the use of known falsehoods, partial truths, or masquerades in propaganda to mix up an opponent.
  • Blackmail is the act of threatening someone to do something that would hurt them in a few way, such as by revealing sensitive information about them, in order to force the threatened party to fulfil certain demands. Ordinarily, such a threat is illegal.
  • If the black eight-ball, in billiards, is sunk before all others are out of play, the player loses.
  • The black sheep of the family is the ne'er-do-well.
  • To blackball someone is to block their entry into a club or a few such institution. In the traditional English gentlemen's club, members vote on the admission of a candidate by secretly placing a white or black ball in a hat. If upon the completion of voting, there was even one black ball amongst the white, the candidate would be denied membership, and he would never know who had "blackballed" him.
  • Black tea in the Western culture is known as "crimson tea" in Chinese and culturally influenced languages ( , Mandarin Chinese hóngchá; Japanese kōcha; Korean hongcha), perhaps a more accurate description of the colour of the liquid.
  • "The black" is a wildfire suppression term referring to a burned area on a wildfire capable of acting as a safety zone.
  • Black coffee refers to coffee without sugar or cream.