What is color addition?

The mixing of coloured lights is called colour addition. When lights of different colours are mixed, different colour effects are observed.

Primary Colors are those which combine to produce white light and which can be used to produce light of all other colours.

The three primary colours are Red, Green, and Blue.
                     Red+Green+Blue = White
                     Red+Green =Yellow
                     Blue+Green = Cyan
The colours Yellow, Magenta and Cyan produced when two primary colours mixed are called "Secondary Colors".

The combination of coloured lights to give different colours is represented in below figure.

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