ADDITIVE COLOUR: An additive color model involves light emitted from a source or illuminant. The additive reproduction process usually uses red, green, and blue (RGB) light to produce other colors. Combining one of these additive primary colours with another in equal amounts produces the additive secondary colours cyan, magenta and yellow, combining all three primary lights. 
SUBTRACTIVE COLOUR: A subtractive color model explains the mixture of paints, dyes, inks and natural colorants to create a full range of colours, each caused by subtracting (that is, absorbing) some wavelengths of light and reflecting the others. The color that a surface displays depends on which colors of the electromagnetic spectrum are reflected by it and therefore made visible.
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