Target Renegade CPC to NES Sprites

[Chdonga]

Well how am I supposed to make the right sprites from the CPC version without using the right colors? They would end up looking too much like the sprites they were based on without them.

Sure they won't be the exact colors but you should try using (but you're not limited to) this pallette. If you don't want them to look like that then add shading and make them 16-bit.