How to modify the color of a shipset?

[Kamog]

Is there an easy way to take the pictures from an existing shipset and edit them so that only the color is different? What I'd like to do is this: I like the standard Cryslonite shipset but I don't like the pinkish color. Is there some way to edit each of the pictures in a paint program, so that instead of pinkish, they are green or blue?

I experimented a bit with changing the hue/saturation, brightness etc but don't get good results. When I do somehow get the color to change to green, the black background also becomes greenish so that's not good. I'd appreciate advice on this. Thanks!