There's only one [u]rare[/u] ship that isn't dookie-brown (on Xbox anyways), but it's only sold by the shipmaster sometimes. It's some blue one. I actually found a way to use the first ship you get [u]before you give it to the shipmaster[/u]. It's a worn, scratched-up blue with brown detail instead of the nicer, deeper blue with orange detail that you get when you get your improved Arcadia. I just use it because it's my own little glitch.