Grey

:This article is about the colour. For other meanings of "gray" or "grey", see Grey (disambiguation).

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Grey or gray (the latter more usually in American English) is a colour seen commonly in nature. It is created by mixing white and black in different proportions. Depending on the amount of light, the human eye can interpret the same object as either grey or some other colour.

Related Topics:
American English - Colour - White - Black

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Two colours are called complementary colours if grey is produced when lights of the two colours are combined. The psychological primary colours are:

Related Topics:
Complementary colour - Primary colour

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• Black and White
• Blue and Yellow
• Red and Green

Other sets of complementary colours include:

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• Orange and Sea blue
• Lime and Purple

Grey is its own complement. In an afterimage, which can be seen after seeing the picture for about 30 seconds, the colours will switch to their complements.

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Grey: Usage, symbolism and colloquial expressions ►