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Colour Blindness


Inability or reduced ability to see colours/colour differences under normal light conditions.

About 8% of men and 0.4% of women suffer.

Most common in red-green area.

Complete colour blindness resulting in only black & white affects only 0.00001% of both genders.

Mostly an inconvenience. Can be restrictive, i.e. aircraft pilots need perfect colour vision.

Consider colour blindness when defining colour scheme for web sites, especially text on background.

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  1. Effective Use of Colour | Adventures in DBA Land

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