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:
“Pockets: What color is a giraffe?
Dallas: Well, mostly yellow.
Pockets: And whats the color of a New York taxi cab?
Dallas: Mostly yellow.
Pockets: I drove a cab in Brooklyn. I just pretend its rush hour in Flatbush and in I go.”
—Leigh Brackett (19151978)
“The pills are a mother, but better,
every color and as good as sour balls.
Im on a diet from death.”
—Anne Sexton (19281974)
“But whenever the roof came white
The head in the dark below
Was a shade less the color of night,
A shade more the color of snow.”
—Robert Frost (18741963)