How do archaeologists determine skin texture and color from bones?

They don't determine the 'color' from the bones as much as they determine the ethnicity. Each ethnicity has different bone structures. For example: those in the heart of africa usually have wider nasal cavities and broader brows.

If you know the ethnicity, all you do is look at the people of that ethnicity and see what kind of skin tone they have.

They can't they assume from the way the rocks around the fossil look.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.