Visual perception of light wavelengths

Colour or color[1] is a property of light as seen by people. In Commonwealth English, it is spelled “colour” (notice the U), while in American English it is “color” (no U).

Results of adding different colours of light
Results of subtracting different colours of light
Pigment Colours - Classification

The most common colour names are:

"Primary colours" can be mixed to make other colours. Red, yellow, and blue are the three traditional primary colours. The primary colours for television screens and computer monitors are red, green and blue. Printers and paints use magenta, yellow, and cyan as their primary colours; they may also use black. Sometimes this set of colours is simply called red, yellow, and blue.

People who can not see colours or have a distorted sense of colour are called colour blind. Most colour blind people are male.

Colours are sometimes added to food. Food colouring is used to colour food, but some foods have natural colourings, like beta carotene.

When something has no colour, it is transparent. An example is air.

The science of color is sometimes called chromatics, colorimetry, or simply color science.

A translucent material is not the same as a colourless material because it can still have a colour, like stained glass.

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