Colour

Produced by light of various wavelengths, and when light strikes an object and reflects back to the eyes. Colour is an element of art with three properties: (1) hue or tint, the colour name, e.g., red, yellow, blue, etc.: (2) intensity, the purity and strength of a colour, e.g., bright red or dull red; and (3) value, the lightness or darkness of a colour. When the spectrum is organized as a color wheel, the colours are divided into groups called primary, secondary and intermediate (or tertiary) colours; analogous and complementary, and also as warm and cool colours.

Colours can be objectively described as saturated, clear, cool, warm, deep, subdued, grayed, tawny, mat, glossy, monochrome, multicolored, particolored, variegated, or polychromed. Some words used to describe colours are more subjective (subject to personal opinion or taste), such as: exciting, sweet, saccharine, brash, garish, ugly, beautiful, cute, fashionable, pretty, and sublime.

Sometimes people speak of colours when they are actually refering to pigments, what they are made of (various natural or synthetic substances), their relative permanence, etc. (Artlex.com)

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