<computer graphics> (US "color") Colours are usually represented as RGB triples in a digital image because this corresponds most closely to the electronic signals needed to drive a CRT. Several equivalent systems ("colour models") exist, e.g. HSB. A colour image may be stored as three separate images, one for each of red, green, and blue, or each pixel may encode the colour using separate bit-fields for each colour component, or each pixel may store a logical colour number which is looked up in a hardware colour palette to find the colour to display.

Printers may use the CMYK or Pantone representations of colours as well as RGB.

American spelling: color

(01 Apr 1999)

1. That aspect of the appearance of objects and light sources that may be specified as to hue, lightness (brightness), and saturation.

2. That portion of the visible (370-760 nm) electromagnetic spectrum specified as to wavelength, luminosity, and purity.

Origin: L.

American spelling: color

(05 Mar 2000)

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