23rd
“Peplos” Kore, Geek, about 530 BC
The version on the left is the colors that have been identified from taces. On the right is a speculative indication of what the sculpture may have looked like. The hair is painted dark brown despite the fact that almost all Greek sculpture has traces of red pigment on hair. There is some indication from some traces that it was common practice to paint another color over the top of the red. This is still a common practice of modern portrait artists. They might not always use red for the under color, but whatever the color used artists finds it gives more realism and depth to the hair to paint one color over the top of another.
The fact that some colors survive better than others can often help when trying to identify the traces of pigments deep in microscopic crevices.