you cant, But some map packs have other colors for vehicles.
only in halo reach you can to that
No only change your color.
Only the color of the armor.
Halo 3 I'm guessing Start, Right, Down, A. That'll give you the ability to change your color, armor, emblem etc.
No, it just looks awesome!
yes
Halo is a planet and has no specific color. As for the outside of Halo it has a metallic look to it.
You could have a look on "Moc pages" they have lots of halo vehicles. Or you could use your imagination.
halomaps.org
Sorry but no
press Y on it
No, there are no vehicles what so ever, your gonna have to live with mate, sorry.But you can choose vehicles in forge.