Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, green, blue, and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, chromatography, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).
Famous quotes containing the word color:
“Twas mercy brought me from my Pagan land,
Taught my benighted soul to understand
That theres a God, that theres a Saviour too:
Once I redemption neither sought nor knew.
Some view our sable race with scornful eye,
Their color is a diabolic die.
Remember, Christians, Negroes, black as Cain,
May be refind, and join th angelic train.”
—Phillis Wheatley (c. 17531784)
“The sky above the port was the color of television, tuned to a dead channel.”
—William Gibson (b. 1948)
“Actors work and slaveand it is the color of your hair that can determine your fate in the end.”
—Helen Hayes (19001993)