Go Get 'Em, Rei Alexander Joseba is a senior concept artist now at Ubisoft, who has in the past worked on games like Unreal Tournament 3 and Watch Dogs. You can see more of Joseba’s work at his personal site and ArtStation page.
For the Tuareg, the colour blue really does run skin deep. Due to the lack of water in the Sahara, they use powdered indigo to dye their robes. The dye however, has a tendency to bleed onto the skin of its wearer when subjected to desert temperatures.