Well atomr, those pretty much are the colors for those two guys!
If you're going for a Marvel look, check out the comix for shading and other color nuances.
As for manufacturers, didn't Horizon have a line of vinyl kit-use acrylics out? Didn't Testors have a line too, for that matter? Yours are styrene kits, but they may have some specific colors like "Hulk Green" or thereabouts. I'm not sure, though.
Sorry, I realize this isn't much help!
The funniest thing is, I'm red-green color blind! Just gotta read those labels, and hope for the best!
Good luck with those cool figures.