Lighting

Subtractive and additive colour mixing

Colour mixing is the combination of effects of two or more lighting gels which are either:

Subtractive - Is used to obtain a colour effect that is unavailable from stock. Combining colours this way reduces the light towards blackness. The three primary colours of red, green and blue combine together subtractively forms black.

Additive - focus two coloured beams of light into the same area. Combining the primary or complementary colours additively forms white.