Three (or more) ground colours of a display which build all the other colours. Generally, red, green, and blue are used as primary colours of a projection system.

One of a small set of coloured lights which, when added together in different proportions, can produce a wide range of perceivable colours.

A colour that cannot be produced by mixing any combination of other colours. The three primary colours of light are red, green and blue.

A colour which cannot be made by mixing other colours.

the three colors of red, blue and yellow from which all colours can be derived with the addition of black and white.