How do I overlay a camo sprite over another?

Right, so, I'm asking this more so because I'm not even sure if it's possible. I'm trying to take a 'camo' sprite, which has a different animation frame for various camos, and overlay it somehow over a base 'mech' sprite which is black and white.

Those are indeed MegaMek sprites, but I'm using them for now since they demonstrate what I'm trying to achieve. I just have no idea how they did it. Is it possible, and if so where should I be looking?

hey - try playing around with blend modes -> https://www.scirra.com/manual/146/effects

I'm quite sure you can do that using the "destination in" - blendmode