I hate to say this but if we traced our gene pools I am willing to bet there are only a few if any pure bloods left.
Capturing of people for slavery and such going way back has ensured this. Now with global travel it is going to finish the mixing and I think the Asian cultures might be the last ones standing untainted in blood line.
We will just have varying shades of brown that include albinos to the darkest skin tones in Africa.
That is to say I think many just think they are white and have no understanding of what our true breeding patterns are.
While my line is pretty dominate white I think there is some others mixed in with my heritage. The only issue with my linage is that we breed very white. It is part of being Danish. Blonde hair and blue eyes are also very strong in my heritage. So while I may have other races in my ancestry we still all look very white *smile*.