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This red is a tone of Indian red, made like Indian red with pigment made from iron oxide. The first recorded use of English red as a color name in English was in the 1700s (exact year uncertain). [10] In the Encyclopédie of Denis Diderot in 1765, alternate names for Indian red included "what one also calls, however improperly, English Red." [11]
The most common synthetic food coloring today is Allura Red AC, a red azo dye that goes by several names including: Allura Red, Food Red 17, C.I. 16035, FD&C Red 40, [25] [26] It was originally manufactured from coal tar, but now is mostly made from petroleum.
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Red (RGB), RGB red, or electric red [citation needed] (as opposed to pigment red, shown below) is the brightest possible red that can be reproduced on a computer monitor. This color is an approximation of an orangish red spectral color. It is one of the three primary colors of light in the RGB color model, along with green and blue.
Falu red is still widely used in the countryside. The Finnish expression punainen tupa ja perunamaa, "a red cottage and a potato patch", referring to idyllic home and life, is a direct allusion to a country house painted in falu red. Falu red after being mixed and cooked to a paint
[2] More recently, pigments were created from dyestuffs from mineral and animal sources, The best known is cochineal, made from insects. Red Lake pigments are famous for their translucency. To paint richly-closed red fabrics, Medieval painters often used several layers of translucent lake colors over a base of lake mixed with lead white or ...
Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey images. [1] [2] Such illusions have been reported for over a century and have generally been attributed to some form of chromatic ...
Approximately 1 in 12 men and 1 in 200 women with Northern European ancestry have red-green colour blindness; this and other types affect people worldwide. [1] This table shows "safe" groups of colours which are distinguishable to most colour-blind people, although colour should never be used as the sole method to convey information.