A) The basic parallel component analogue signal set (red, green, blue) in which a signal is used for each primary color. These three colour signals are generated by the camera and are used in the colour television’s additive colour reproduction system to produce a picture. Also used to refer to the related equipment, interconnect format or standards. The same signals may also be called “GBR” as a reminder of the mechanical sequence of connexions in the SMPTE interconnect standard.

b) A colour model used chiefly for computer displays in which colours are specified according to their red, green, and blue components. Compare YUV.