I am also red/green color blind. And this does have an effect on blues as well. I do tend to try to get on the red team as much as possible because in all honesty, red blends in with the game environment too much for me. A well thought out game, IMHO, will have taken colorblindness into effect. However, I don't hold it against them, it does take that little extra in a game. I will simply play that game less often. I have noticed that in some maps on cod4 I have an extra hard time picking out targets simply because it takes me longer to realize what they look like. I know it sounds easy, but alot of the time I will not shoot just because I like to play on FF matches, and that extra split second or two can make a huge difference.