I don't like the idea of Drow (who never see the light of day) with heavily pigmented skins, so I chose GW Shadow Grey as the skin base colour. It looks suitably alien, so nobody will mistake this one for a surface Elf!
I first used black, but changed it since it blended in with the other dark colours. Brown gives a better contrast (IMHO).
After that, I picked out the belt, quiver and straps in Bestial Brown.
I painted the buckles and sword hilt Vallejo Game Colour Bright Bronze, the bow Vallejo Colour Saddle Brown, and the small protrusions on the bow GW Bleached Bone. I gave her some eyeshade by painting the eyelids Liche Purple, and the lower lip was painted Warlock Purple.
Now that most of the colours are already on, I washed the entire miniature with Winsor & Newton Nut Brown ink, straight from the bottle. Where there was too much ink pooling, I removed the excess with a brush. It shaded the figure nicely, and defined the different areas. The fact that the ink is easy and quick to apply does not hurt!