I think her point is that people in north Africa (and Africa as a whole) identify ethnically/regionally. I know for a fact there are color descriptors in Mauritania and Morocco, but there's much more emphasis on regional identification. E.g., soussa are soussi, drawa are draoui, people that live south of Morocco proper consider themselves sahraoui, etc. Or you have urban designations, like Bidaoui, R'bati, Tanjaoui, etc.