Make a good use of Calcium Powder -- mix it with the base solution of bees wax and coconut oil (premixed). I would use dedicated blender for all handmade cosmetics. You can add honey and herb extracts to nourish your skin with that paint. Be creative :)
Most calcium supplements are made out of limestone -- substitute with crushed egg shells or coral or milk based calcium if you feel bad about stoning yourself. It's probably OK for external use however. You can also try some clays for tinting your whites: white clay or bluish, or others.
You can make some using food supplies: think [bees wax + oil (coconut, olive, tea tree, or other) + a bit of honey] = foundation. Add dies: Turmeric for yellows, Hibiscus for reds, Potatoes for tints of blues and, Mica for sparkles, e.t.c. Mix and match.
Never put anything you can't eat on your skin -- it's the largest organ in your body and it practically eats whatever you put on it.
Check this out:
If you don't want to make your own paints: