As shown in this picture of female body painting, a red dye made from indigenous plants is often used. However, Indian girls also commonly adorn their faces and bodies with natural pigments such as "huito," paints, tattoos, dyes, clay, carbon, and sometimes ashes.
Wet charcoal is particularly stunning for female body painting purposes in that it dries a blue-black color. Female body painting encompasses a wide array of indigenous Amazonian ideas, ranging from cosmologies, mythologies, fine arts, alternative arts, to enhancing certain body parts.
source : http://www.amazon-tribes.com/Female-Body-Painting.html