Primary colors are sets of colors that can be combined to make a useful range of colors. For human applications, three primary colors are usually used, since human color vision is trichromatic.
For additive combination of colors, as in overlapping projected lights or in CRT displays, the primary colors normally used are red, green, and blue. For subtractive combination of colors, as in mixing of pigments or dyes, such as in printing, the primaries normally used are cyan, magenta, and yellow, though the set of red, yellow, blue is popular among artists. See RGB color model, CMYK color model, and RYB color model for more on these popular sets of primary colors.
Any particular choice for a given set of primary colors is derived from the spectral sensitivity of each of the human cone photoreceptors; three colors that fall within each of the sensitivity ranges of each of the human cone cells are red, green, and blue. Other sets of colors can be used, though not all will well approximate the full range of color perception. For example, an early color photographic process, autochrome, typically used orange, green, and violet primaries. However, unless negative amounts of a color are allowed the gamut will be restricted by the choice of primaries.
The combination of any two primary colors creates a secondary color.
The most commonly used additive color primaries are the secondary colors of the most commonly used subtractive color primaries, and vice versa.
Other articles related to "primary color, color":
... See also Natural Color System, Unique hues The opponent process is a color theory that states that the human visual system interprets information about color by processing ... The opponent color theory suggests that there are three opponent channels red versus green, blue versus yellow, and black versus white ... Responses to one color of an opponent channel are antagonistic to those of the other color ...
... goes either to three digital-to-analog converters (DACs) (for analog monitors), one per primary color, or directly to digital monitors ... Modern systems encode pixel color values by devoting eight bits to each of the R, G, and B components ... directly by the pixel bits themselves, or provided by a separate color look-up table (CLUT) if indexed color graphic modes are used ...
... Kelly Green Color coordinates Hex triplet #4CBB17 sRGBB (r, g, b) (76, 187, 23) CMYKH (c, m, y, k) (59, 0, 88, 27) HSV (h, s, v) (101°, 87%, 73%) Source B ... fact that the surname Kelly, as well as the color green, are both popular in Ireland ... The first recorded use of the term kelly green as a color name in English was in 1917 ...
Famous quotes containing the words color and/or primary:
“Surely the day will come when color means nothing more than skin tone, when religion is seen uniquely as a way to speak ones soul; when birth places have the weight of a throw of the dice and all men are born free, when understanding breeds love and brotherhood.”
—Josephine Baker (19061975)
“At the heart of the educational process lies the child. No advances in policy, no acquisition of new equipment have their desired effect unless they are in harmony with the child, unless they are fundamentally acceptable to him.”
—Central Advisory Council for Education. Children and Their Primary Schools (Plowden Report)