Colour mixing is combining the effects of two or more lighting gels and can be either subtractive or additive.
Subtractive mixing is used to obtain a colour effect, combining colours reduces the light towards blackness. The three primary colours of light (red, green and blue) mix subtracively to form black.
Additive mixing focus’s on two different coloured beams of light, onto the same area. Combining colours in this way adds the colour together, to eventually arriving at white. The three primary colours additively mix to form white.
