Color Blindness Simulator
Color blindness is reduced ability to distinguish between certain colors or wavelengths of light. It is, most commonly, a lack of distinction between the colors red and green. It is not generally a lack of seeing all colors (this is extremely rare). It is usually inherited.
"Red-green" color blindness is observed among one out of twelve Caucasian (8%), one in 20 Asian (5%), and one in 25 African (4%) males. (via)
This online tool simulates two types of color blindness:
- Protanopia (referred to as "red-weakness"): lacking the long-wavelength sensitive retinal cones. Those with this condition are unable to distinguish between colors in the green-yellow-red section of the spectrum.
- Deuteranopia (referred to as "green-weakness"): lacking the medium-wavelength cones. Those affected are again unable to distinguish between colors in the green-yellow-red section of the spectrum as well.
- Tritanopia: lacking the short-wavelength cones, those affected are unable to distinguish between the colors in the blue-yellow section of the spectrum. This form of color blindness is not sex-linked.