Sudanese: "What are you doing with that tarbush, it's yellow!"  No worries, kids, it a Medium Fleshtone basecoat. Red or yellow do not go well over white so I use a flesh colour for the basecoat.  For yellow, I'll just highlight it up and then wash it yellow ink. 

 For red I use Vallejo Gory Red over the tarbush.  By this time I have also painted all of the belts black.