V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
Rot Gruen Blau / Red Green Blue (color system, DTP)
The Free On-line Dictionary of Computing (30 December 2018):
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).