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FACE & REAR It really is worth looking at lots of picture for this sort of  project. I usually print out some relevant pictures if I have no  book reference to hand (which I didn’t).  The Red Starting with Dragon Red as the shade colour, I did all the  design, trying to follow what a real mandrill looks like. I then  mixed Matt White to the Dragon Red and highlighted the  design, then mixed more Matt White to that mix and  highlighted it again, the red on the mandrill is really rather  pinkish.   The Blue The blue shade colour is a mix of Deep Blue and Crystal  Blue. For the highlights I added Matt White in three  successive layers.
Above & right. The Red starts with Dragon Red as the shade colour, trying to follow what a real mandrill looks like. Then Matt White is mixed to the Red and used to highlight the design, then more White is mixed to that and used to highlight again.
Below. The blue shade colour is a mix of Deep Blue and Crystal Blue. For the highlights add Matt White.