Thanks, Gandalf, Sicks, and Grayfax!
Grayfax, if it's any help, here's a bit more detail on the mix I used... For the basecoat, I used Dark Green from Badger Minitaire and Burgundy Wine from Reaper (roughly 2 parts green to 1 part burgundy). To shade, I mixed more and more Burgundy wine into the base color. To highlight, I added a 50/50 mix of Dark Elf Skin and Vampiric Shadow into the base. For the topmost highlights, I used pure Vampiric Shadow.
You can use substitutes for all those paints, just get similar colors. You can see three of those four colors below. The reason I used a 50/50 mix of the Vampiric Shadow and Dark Elf Highlight has nothing to do with those specific colors, I just wanted a grey that was lighter than the Dark Elf Highlight, but not as light as Vampiric Shadow... so I split the difference and mixed the two.