color blind is a disability :(

Dichromasy
- can be divided into protanopia and deuteranopia (two out of 100 males):
These individuals normally know they have a color vision problem and it can effect their lives on a daily basis. They see no perceptible difference between red, orange, yellow, and green. All these colors that seem so different to the normal viewer appear to be the same color for this two percent of the population.


Protanopia
(one out of 100 males):
For the protanope, the brightness of red, orange, and yellow is much reduced compared to normal. This dimming can be so pronounced that reds may be confused with black or dark gray, and red traffic lights may appear to be extinguished. They may learn to distinguish reds from yellows and from greens primarily on the basis of their apparent brightness or lightness, not on any perceptible hue difference. Violet, lavender, and purple are indistinguishable from various shades of blue because their reddish components are so dimmed as to be invisible. E.g. Pink flowers, reflecting both red light and blue light, may appear just blue to the protanope.


Deuteranopia
(one out of 100 males):
The deuteranope suffers the same hue discrimination problems as the protanope, but without the abnormal dimming. The names red, orange, yellow, and green really mean very little to him aside from being different names that every one else around him seems to be able to agree on.



Being color blind is officially considered a disability, however there have been studies documenting certain advantages including penetrating some camouflages. For instance – it was found during World War II that analysis of aerial photos yielded better results if at least one member of the surveillance team was color blind. It has also been suggested that females with one mutated X chromosome may be afforded an extra dimension of color awareness as they may have at least four types of cones in their eyes rather than two.