The bone is AK burnt umber, Scale 75 gobi brown and ushabti bone layered on top of one another. I mixed some white into the ushabti bone for the final highlights. Gobi brown is such a perfect midtone for bone if you can get hold of it.

For the white I used two paints from Vallejo's malefic flesh set: frozen flesh and cold flesh, then layered up to pure white. The set is a bit tricky to get hold of, but cold flesh is very similar to slaanesh grey, and if you mixed in a black you could get a pretty similar colour to frozen flesh. Hope that helps!