Red, Green, and Blue. A color space most commonly used in computer graphics and component video, where the three additive color components are mixed to create a color.
Most computer-generated images are stored on disk in RGB format, so it is easiest and quickest to display them in RGB video. Because few video recording devices accept RGB video, another piece of equipment is often used to translate the RGB signals into other formats such as NTSC, or Y,R_Y, B-Y.