[Draft] Color Perception

Specialized cells, known as cones, which are located in the retina of the eye allow a person to see color. When these cells are absent of or malfunctioning it can result in a decreased ability to see color or a decreased ability to tell colors apart. Generally 4 types of color disabilities exist:

  1. Red disability: a person has difficulty distinguishing green–yellow–red. Red, orange and yellow brightness is reduced.
  2. Green disability: a person has difficulty distinguishing green–yellow–red. Medium tones of red are likely to be confused with oranges and yellows.
  3. Blue disability: a person has difficulty distinguishing blue-green and yellow-violet.
  4. Complete color disabilty: a person cannot perceive color. He or she can only distinguish light, dark and some shades of grey. This is very rare.

The term "colorblind" is frequently misleading as it seldom means a person sees in greyscale.

Simulated examples of color perception

No color disability
Example of full color perception
Protanopia disability
Example: complete green–yellow–red disability (protanopia)
Protanomaly disability
Example: some green–yellow–red malfunction (protanomaly)
Deuteranopia disability
Example: complete green–yellow–red disability (deuteranopia)
Deuteranomaly disability
Example: some green–yellow–red malfunction (deuteranomaly)
Tritanopia disability
Example: complete blue-green and yellow-violet disability (tritanopia)
Tritanopialy disability
Example: complete blue-green and yellow-violet disability (tritanopialy)
Achromatopsia disability
Example: complete color disability (achromatopsia)

Color Simulators