The recipe, with the bleached bone, will give a brownish colour. The charadon granite is a Deep Brown grey, and then the dheneb stone is a light brown grey. and then bleached bone is a yellow colour. Then you wash particular areas with ogryn flesh and gryphonne sepia, the flesh wash will give a reddish tinge, and the sepia a more natural yellow brown tinge. It should be pretty good. To be honest i've never used this mixture, but it just looks like thats similar to the tones in the pic you put.
Check it out and see how it looks. and yah Shawn, Great pic!
cheers, Gary.