Here’s some great info on colorblindness.

I was talking to Diane the other day, who was trying to help me with the colors on my site. And, I explained that I’m red/green colorblind. The world I see is not the same as 91% of the rest of the world. Oddly enough, there are three people at work including me with the same colorblindness, and one of them is on my team. So we totally understand each other. Its funny how much this affects everyday life really. Websites don’t look the same, stoplights turned sideways can be confusing (Simon found that out in Calgary, haha), video games using red and green to indicate friend or foe. So, I thought I’d share some of my world with all of you. So, take a look at some of the cool stuff here!

http://en.wikipedia.org/wiki/Color_blindness

I’m classified as Deuteranomaly.

Having a mutated form of the medium-wavelength pigment. The medium-wavelength pigment is shifted towards the red end of the spectrum resulting in a reduction in sensitivity to the green area of the spectrum. Unlike protanomaly the intensity of colors is unchanged. This is the most common form of color blindness, making up about 6% of the male population. The deuteranomalous person is considered “green weak”. For example, in the evening, dark green cars appear to be black to Deuteranomalous people. Similar to the protanomates, deuteranomates are poor at discriminating small differences in hues in the red, orange, yellow, green region of the spectrum. They make errors in the naming of hues in this region because the hues appear somewhat shifted towards red. One very important difference between deuteranomalous individuals and protanomalous individuals is deuteranomalous individuals do not have the loss of “brightness” problem.

(Wikipidea, http://en.wikipedia.org/wiki/Color_blindness)

This site has a cool little tool that you can change how the picture looks.
http://webexhibits.org/causesofcolor/2.html
If you rollover Deutan you’ll see how that picture generally looks to me.

This one is a tool that you can use to see the color pallet affect.
http://colorlab.wickline.org/colorblind/colorlab/