rgb

from The Free On-line Dictionary of Computing (8 July 2008)

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).

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

RGB
       Rot Gruen Blau / Red Green Blue (color system, DTP)