Rather than rely simply on the Reaper skin tone triads, I have used Crimson Red, Burgandy Wine, Winter Blue, Pale Lavender and Old West Rose to work down into the shadows (all paints used are from Reaper). A more complete description of the technique can be found at The Analogue Hobbies Painting Challenge.
Figures are from Hasslefree Miniatures, are 28mm and were sculpted by Kev White.
These are the first three out of a team of five. The other two figures are being done in a deep ebony skin tone. When I post those figures I will endeavour to do a detailed description of how those skin tones were achieved.