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Color Blindness

There are many kinds of color blindness as illustrated in this chart. Men are much more likely to be color blind than women.

Type of Vision Deficiency	Percent of Males	Percent of Females
Deuteranomaly Difficulty distinguishing between greens, reds, oranges and yellows Difficulty distinguishing between blue, violet, purple, lavender Green looks black in low light No abnormal dimming	4.9	0.38
Deuteranopia Unable to distinguish red, orange, yellow and green Unable to distinguish blue, violet, purple, lavender No abnormal dimming	1.1	0.01
Protanomaly Reds look darker than they are, may look black Difficulty distinguishing red, orange, yellow and green Difficulty distinguishing blue, violet, purple, lavender Brightness of red, orange, yellow is quite reduced	1.0	0.02
Protanopia Reds look darker than they are, may look black Unable to distinguish red, orange, yellow and green Unable to distinguish blue, violet, purple, lavender Brightness of red, orange, yellow is quite reduced	1.0	0.02
Tritanomaly Difficulty distinguishing blues and yellows	~0	~0
Tritanopia Unable to distinguish blues and yellows	0.002	0.001
Cone monochromatism Total color blindness caused by a having only one cone type.	~0	~0
Rod monochromacy Total color blindness caused by a having no cone cells.	0.003	0.002
Total	8.0	0.4

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