color

Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, yellow, blue, black, etc. Color derives from the spectrum of light (distribution of light energy 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.
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n. color, hue, tint; flush; dye

(v. t.)
To hide.
  

(v. t.)
To change or alter, as if by dyeing or painting; to give a false appearance to; usually, to give a specious appearance to; to cause to appear attractive; to make plausible; to palliate or excuse; as, the facts were colored by his prejudices.
  

(v. t.)
To change or alter the hue or tint of, by dyeing, staining, painting, etc.; to dye; to tinge; to paint; to stain.
  

(v. i.)
To acquire color; to turn red, especially in the face; to blush.
  

(n.)
The hue or color characteristic of good health and spirits; ruddy complexion.
  

(n.)
That which is used to give color; a paint; a pigment; as, oil colors or water colors.
  

(n.)
That which covers or hides the real character of anything; semblance; excuse; disguise; appearance.
  

(n.)
Shade or variety of character; kind; species.
  

(n.)
Any hue distinguished from white or black.
  

(n.)
An apparent right; as where the defendant in trespass gave to the plaintiff an appearance of title, by stating his title specially, thus removing the cause from the jury to the court.
  

(n.)
A property depending on the relations of light to the eye, by which individual and specific differences in the hues and tints of objects are apprehended in vision; as, gay colors; sad colors, etc.
  

(n.)
A distinguishing badge, as a flag or similar symbol (usually in the plural); as, the colors or color of a ship or regiment; the colors of a race horse (that is, of the cap and jacket worn by the jockey).
  

In heraldic terms, as distinct from the metals.
Green = Vert
Gules = Red
Azure = Blue
Purpur = Purple