ok, finally a bike question I can help with. I personally LOVE blue with orange. Like a "blue" for nice contrast. or International Klein Blue for a sophisticated color combo. or federal blue for something that's almost black from far away but isn't just black.
http://en.wikipedia.org/wiki/Category:Shades_of_blue
Also, you should know I'm full of shit. I didn't go to art school and I've never built a bike. I just like what i like and thats all