Oh man this thing was a beast. Almost a full week of working on this and my brain's about fried!
Done for the weekly challenge at Pixel Joint: 8 colors + transparency, Angel character with a specific red, 100x100
Still not totally satisfied with it, and might update this later with improvements, but it's done enough to get entered for the challenge today so that's it for the moment!
MASSIVE thanks to everyone who helped me out on PJ's forums with this thing. It wouldn't have gotten even fractionally this good without them! If anyone is interested: The WIP thread on PJ's forums
which has all of my process on this thing!