>You're right, I studied this problem, and how to handle it: the result is, if you're going to use colors to differentiate, you should let the users select their own colors for the text or background. Then even color-blind individuals can choose colors which are good for them...

Well, what if they can only see black and white? Then a great UI idea will be useless for them.

I think I'd use something else, like underlining, boxing, an asterisk, etc. It wouldn't look as cool, but it would be immediately useful to all users.