Additive colours are produced through the addition of different coloured light. In theory, every colour can be produced by mixing the primary colours of the visible light spectrum: red, green and blue (RGB). Combining all three primary colours to equal parts produces white. The colour vision of the human eye works through red-, green- and blue- sensitive sensory cells. When, for example, red and green rays of light reach the corresponding receptor cells in the eye, we see the mixed colour yellow. When all three colour receptors are stimulated, the eye sees white. RGB is the usual additive colour system and is used predominantly for television screens, computer monitors and scanners. Combining two of the primary colours in equal parts produces the secondary colours cyan, magenta and yellow, which in turn form the basic colours of the subtractive colour system CMYK).

In photographic reproduction, the primary colours of red, green, and blue which are mixed to form all other colours.

Red, green and blue (RGB), the colours of light used in monitors and scanners, which give the perception of white when added together.

Colours that make up white light; red, blue, and green are the additive primary colours.

The primary colours of light - red, green and blue (the RGB “colour space”) that may be mixed to form all other colours in photographic reproduction and in computer monitors.

Red, Green, and Blue are referred to as additive colours. Red+Green+Blue=White.

The three additive primary colours are red, green and blue. When these three colours of light are mixed in equal proportions, they will produce white light. Also known as additive primaries.