The colour of an object is the colour of the light leaving it's surface and depends on the illumination and reflectance properties of the surface.

Pigments are chemicals that selectively absorb and reflect different spectra of light. Light hitting a painted surface is reflected minus some wavelengths. Most paints are a blend of several pigments intended to produce a reflection of a certain color.

Color plays a vital role in the world we live in. It can sway thinking, change actions, cause reactions. It can irritate or soothe your eyes etc. When used in the right way colors can save on energy consumption. As a communication tool color is irreplaceable. Red means stop and green means go and traffic lights send this universal message.