Who said I was talking about hair color? I was only mentioning wavy/curly hair being a result of dry heat adaption.
As for that hair color.
"Blondism, especially in young children,is common in many dark haired populations (e.g. Australian, Melanesian), and is still found in some Nubian villages.“
(-Hardy D. 1978. Analysis of Hair..AJPA 49)
But more importantly it isn't taboo for different African rural tribal groups to dye their hair(not with the stuff westerners use) like the one in the pic I posted.