for base paint i'm using the Italeri's paints 4796 Flat Panzer Dunkelgelb 1943 (RAL7028) mixed with 4390 Flat Light Flesh in the ratio of 6:1 to lighten the dark tones a little
I have started the RAL6003 Olivgrün parts using Italeri's 4798AP Flat Panzer Olivgrün 1943 mixed with the 4781AP Dunkelgrün RLM71 to tone, but I don't remember more what is the ratio!