Top image: pure shape pallet without edit

Bottom image: Edited. The mirror was done by hand.

Was messing around with a tile set editor's default tile set, and ended up with this. The original tile set was 8x larger though- http://www.ambient-art.net/files/battleship.png. Apologies for the anti-aliasing, it may be a bit sketchy. My DVI cable broke, and the RGB one I'm using now is extremely blurry; a lot of this was done from 2x so I could see the difference between AA and the contrast between black/white.

I had a transparent background, but removed it because my grey was too close to the background color of one of the themes.