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The perception of the different wavelengths of light. It is possible to create almost all visible colors using two systems of primary colors. Transmitted colors use red, green and blue (RGB), and reflected colors use cyan (light blue), magenta (purplish-red), yellow and black (CMYK). Color displays use RGB (colors are added to create white) and color printing uses CMYK (colors are subtracted to create white).

Color Mixing Methods
The two major ways to create colors are RGB and CMY. RGB uses red, green and blue pixels for the display screen. CMY uses cyan, magenta and yellow inks to print on paper. In theory, equal parts of cyan, magenta and yellow ink make black, but the blacks tend to be muddy. Thus, a pure black fourth ink is always used in the four color CMYK process (K for blacK).
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What does it mean when you dream about colors?

Many colors in a dream may depict energy, as colors are vibrations of light. A single color seen in a dream can be interpreted only in the context of the dreamers relationship with that color. For example, the color red may be experienced as love, romance, and sex. For someone else, or in another dream, the color red may denote blood, death, and destruction. Black may mean evil, witches, and black cats, or sophistication and elegance.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.
References in periodicals archive ?
- A "physical library" consisting of over 4300 colors, in 6 volumes.
"My daughter-in-law likes these colors but I don't know what else would work with them."
Working from the middle of the axis to the "b+" or yellow side, the numerical values for the corresponding colors get larger.
In my art room, students in lab coats stir colors in old kitchen pots.
It is useless to ask color-deficient students if the Vis-check image represents what they see, as their eyes will continue to shift the colors in any image shown.
Zimmer, PQI: Interior colors are much easier to change and therefore change more regularly.
Edge coloring: Edge coloring of a graph [1] refers to assigning colors to edges so that adjacent edges are differently colored.
Among the new devices claiming these benefits were a non-contact, in-line color-measurement device, an entry-level melt-flow tester, a three-station Vicat heat-distortion tester, and a compact family of color viewing booths with multiple light sources.
Similarly, the recognition of colored papers is possible because they are never printed using the four-color process, whereas identical colors in magazines are printed using the four-color process.
To make such adjustable color sources, he and Andreas Stemmer, both of the Swiss Federal Institute of Technology in Zurich, have invented a novel diffraction grating--a rippled surface that separates white light into component colors, each of which travels away from the grating at a slightly different angle.
In summer, when a plant is green, its leaves contain the pigment chlorophyll, which absorbs all colors of sunlight except green.