In the world of Japanese ink wash painting charcoal is described as containing all five colors.  Color black makes you think of night, but then that idea leads you into the bright white light in the morning and lavender sunset sky.

For SHADES series, I dyed raw silk fabrics with many different sources of tannins, such as oak galls, chestnut, and walnut, and used iron as mordant to create different shades of charcoals.  Some are over dyed with natural dyes, which produces pinks and yellows. I also used indigo and mineral pigments from rocks to paint onto fabrics.