"In the U.S. 7% of the male population – or about 10.5 million men – and 0.4% of the female population either cannot distinguish red from green, or see red and green differently." - Paul Buchheit via Bookmarklet

Crap, they all look the same to me :( - Guillermo Esteves

don't they say dogs are colorblind, too? - Michelle Trent

Interrresting veddy interesting...U.S pop 07 est. would work out about right to 10.5m for male (148m), and just..612174 for females based on 153m...why? Could it be a maternal genetic code thing../? 'Friendfeed for thought' anyway.. - Jason

Color-blindness is recessive and on the X chromosome, so women are far less likely to get it. - Alex Power

@Paul, the quote is completely misleading. 7% of males are anomolous trichomats, but their vision is much more like mine (or, I assume, yours) than like a color blind person's (dichromat's) vision. In particular, they can distinguish just as many colors as you or I, they just chop a different 3 dimensions out of the hyperspectral space of true colors (that is, they have different metamers). Dichromats are 2% of the male population. - j1m

Don't forget the tetrachromats! http://en.wikipedia.org/wiki... - Amit Patel

+1 for the tetrachromats. I'm an anomalous trichromat (otherwise known as partially-color-blind). - Mitchell Tsai

Kind of drab. Glad I'm not color blind, but I know several guys that are. - Jeff P. Henderson

@Mitchell Tsai: Doesn't tetrachromats see more colors than normal humans? They have receptors for a 4th color. Normally it's 3 (RGB). That's why they called tetra (4) chromats ?! - Ryo

Paul: These pages were really cool!! Many Thanks. Got to show my sister what my world looks like. I'm the most common type of color-blind person, "green-weak". (Ryo: +1 for the tetrachromats because I'd never heard of them before). - Mitchell Tsai

As one of the color blind people, and it's always annoying when I see UIs designed for normal colors. Part of it is that the majority of UI designers seem to be women. - Piaw Na

Question for the color blind: do these images (such as the google logo) look exactly like the regular version to you? - Paul Buchheit

@Paul: Yes. I can't tell the difference between that logo and the regular one on Google's home page. I had a world of hurt in Chemistry lab (litmus tests, for instance --- no difference between blue and purple), and in electronics lab (whoever designed color coded stripes to indicate resistance of a resistor needs to be shot). - Piaw Na

@piaw: do you mean they could have chosen better colors, or that color system doesn't quite work for resistors no matter what? - Alex

they look the same to me too and also had the same terrors in chemistry & physics classes at school. Playing cricket with a red ball on green grass was also challenging. - Sally Church via fftogo

It's funny, I came across this exact article yesterday, but didn't think to share it. I was looking for good printable color schemes that everyone can see (no yellow, doesn't rely on a red/green differentiation. Any suggestions? - Clare Dibble

@Alex: they could have picked better colors, instead of for instance, brown and red, or brown and green, which all look the same to me. My uncle, ironically enough, majored in Chemistry despite his color-blindness. He then tried to start a paint company. As you can imagine, the results were not so good. I took the cue and majored in computer science, and tried to stay as far from UI as I could. - Piaw Na