Some color deficient individuals have a hue and brightness problem - some have just a hue problem.

I've got deuteranomaly - problem with my greens - which must be why my favorite color is blue. At least my problem is just a hue issue - not a brightness issue.

So when I see RED it's the same RED as other folks - color, depth and intensity.

GREEN on the other hand - probably not.

http://colorvisiontesting.com/color2.htm