Properties of colour
Colour descriptions and specifications generally include three properties: hue; saturation and brightness. Hue associates a colour with some position in the colour spectrum. Red, green, and yellow are hue names. Saturation describes the vividness or purity of a colour or it describes how diluted the colour is by white light. Pure spectral colours are fully saturated colours and grays are desaturated colours. Brightness is related to the intensity, value, or lightness of the colour.