RGB

Red, Green, Blue. The three colours of light which can be

mixed to produce any other colour. Coloured images are often

stored as a sequence of RGB triplets or as separate red, green

and blue overlays though this is not the only possible

representation (see CMYK and HSV). These colours

correspond to the three "guns" in a colour cathode ray tube

and to the colour receptors in the human eye.

Often used as a synonym for colour, as in "RGB monitor" as

opposed to monochrome (black and white).