Color blindness expresses itself in different ways, and rarely is a person totally color blind.I stopped believing in Santa Claus when my mother took me to see him in a department store, and he asked for my autograph. - Shirley Temple
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Color Blindness

Color blindness expresses itself in different ways.  Rarely is a person totally color blind.

 

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

 

Read more about color blindness.

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