It depends on the application and requirements.
Aqua blue has better 3D graphics. It also has black in it so i think aqua blue is better
blue
BLACK.
hi again, i got the black DSi but you should get the blue one.
blue
there isn't a difference just choose the colour that you think looks better Black if you are a hardcore gamer! Blue if you are a casual gamer!
green
.
Depends. Dark blue and black can set people off of what they see of it, sometimes they think the blue is black. If its a black tie, a light blue shirt can go better if you really want blue.
Brown would be better but without the dark blue shirt, maybe a brown shirt and brown shoes or a black shirt and black shoes. That would be much better. Dark blue and tan= wrong.
I had black hair with red accents in it.. it showed up a lot better than the blue did. If i was you, I would use to blue-black hair color because it will give it that shade of blue. and then add red.