A color theory based on the three primary colors of light (red, green and blue), which combine to produce full color. Light emitting devices, such as television and computer monitors use the additive process to simulate full color.
The three primary colors of white light cannot be produced by the combination of any other colors. When they are combined full strength, they produce white light. An object appears to be white when all of the colors of the white light illuminating the object are reflected back to the eye. If none of the additive primaries are present, the color is perceived as black.
When two primary colors of light are combined, a secondary color is produced. By adding red and green light, each at 100% intensity, yellow is created; by adding blue and green light, each at 100% intensity, cyan is created; and, by adding red and blue light, each at 100% intensity, magenta is created.