<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.
Color Graphics Adapter « color model « Colossus «
» colour depth » colour look-up table » colour model