Primary colours Primary colours is the colours which are used in combination to produce any other hue: blue, yellow, red, black and white.
Colour blindness Colour blindness is a total or partial inability to distinguish colours. Total colour blindness is very rare but partial colour blindness (particularly the inability to
Colour constancy Colour constancy is the tendency for objects to be perceived as the same colour even when the light illuminating them changes colour.
Colour contrast Colour contrast is the tendency for the difference between two colours to be intensified when they are placed side by side .
Colour vision Colour vision is the process by which the eye discriminates between different wave lengths of light, thus providing the brain with the information necessary to perceive what we describe as colours.