I think I'd have blue or purple, they are my favourite colours. Although if I was my real anime-self Mihoshi, I'd have to have blonde hair ^_^
Red (as in ruby red)
Orange
Yellow
Green
Light Green
Blue
Light Blue
Indigo
Purple
Light Purple
Pink
White
Silver
Hair with colored streaks
Blonde
Natural red
Strawberry Blonde
Black
Brunette
Other (which color?)