

What did the Umayyad rulers of Córdoba actually look like?
Ibn Hazm, writing in the early eleventh century, tells us that, "with but one exception, all the Umayyad caliphs and their children were blond like their mothers and predominantly blue-eyed". That one exception, the caliph Abd al- Rahman III (An-Nasir), who "had red hair, light skin, and blue eyes... is reported to have dyed his hair black, to make himself look more like an Arab".
The Invention of Race in the European Middle Ages by Geraldine Heng, p. 142
https://books.google.com.tr/books?id=snRJDwAAQBAJ&pg=PA142&redir_esc=y#v=onepage&q&f=false