[graphics (computing)]
The color space defined by the primary colors red, green, and blue light. Additive color starts with black and adds red, green and blue light to produce the visible spectrum of colors. The more color added, the lighter the result. When all three colors are combined equally, the result is white. Color displays that emit light, such as monitors, are based on additive color space.
[cartography]
A system for numerically specifying colors on the basis of the primary colors of red, green, and blue; used widely in cartography to specify print map colors.