If you have normal color vision and want to see how your color scheme might appear to someone who does not, pixy's Color Scheme Generator at http://wellstyled.com/tools/colorscheme2/index-en.html may be helpful. (I think it's also much more elegant, intuitive, and useful as a color-picker and brainstorming tool than that Flash monstrosity from Adobe, which was being touted here a week or two ago. Just my opinion.)