The colours I used were: Yellow ocre, Ultramarine blue, Cadmium red and Titanium White.
Starting with Yellow ocre and Cadmium red, it makes a nice orange colour. Adding small amounts of Ultramarine blue to give darker shades and Titanium White for the lighter colour.
Then I set out to test my mixes and focused on ears as my topic. The hair was done with Burnt umber and I kept a little bit of Yellow ocre on the pallet to add where needed.