Posts filled under #red

An extract on #red

Red is one of the additive primary colors of visible light, along with green and blue, which in Red Green Blue (RGB) color systems are combined to create all the colors on a computer monitor or television screen. Red is one of the subtractive secondary colors, resulting from the combination of yellow and magenta. (See CMYK color model.) Traditionally, it was viewed as a primary subtractive colour, along with yellow and blue, in the RYB color space and traditional color wheel formerly used by painters and artists. Reds can vary in shade from very light pink to very dark maroon or burgundy; and in hue from the bright orange-red scarlet or vermilion to the bluish-red crimson. Red is the complementary color of cyan. In nature, the red color of blood comes from hemoglobin, the iron-containing protein found in the red blood cells of all vertebrates. The red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide. It also causes the red color of the planet Mars. The red sky at sunset and sunrise is caused by an optical effect known as Rayleigh scattering, which, when the sun is low or below the horizon, increases the red-wavelength light that reaches the eye. The color of autumn leaves is caused by pigments called anthocyanins, which are produced towards the end of summer, when the green chlorophyll is no longer produced. One to two percent of the human population has red hair; the color is produced by high levels of the reddish pigment pheomelanin (which also accounts for the red color of the lips) and relatively low levels of the dark pigment eumelanin. Since red is the color of blood, it has historically been associated with sacrifice, danger and courage. Modern surveys in the United States and Europe show red is also the color most commonly associated with heat, activity, passion, sexuality, anger, love and joy. In China, India and many other Asian countries it is the color of symbolizing happiness and good fortune. Since the 19th century, red has also been associated with socialism and communism.

The word red is derived from the Old English rad. The word can be further traced to the Proto-Germanic rauthaz and the Proto-Indo European root rewd-. In Sanskrit, the word rudhira means red or blood. In the Akkadian language of Ancient Mesopotamia and in the modern Inuit language of Inuit, the word for red is the same word as "like blood". The words for 'colored' in Latin (coloratus) and Spanish (colorado) both also mean 'red.' In Portuguese the word for red is vermelho, which comes from Latin "vermiculus", meaning "little worm". In the Russian language, the word for red, (krasniy), comes from the same old Slavic root as the words for "beautiful" (krasiviy) and "excellent" (prekrasniy). Thus Red Square in Moscow, named long before the Russian Revolution, meant simply "Beautiful Square". In heraldry, the word gules is used for red.