In Karl Bryullov's painting of the sack of Rome, some of the vandals are black. Is there any reason to think the Vandals had picked up black soldiers in North Africa?

by grapp

EDIT: https://upload.wikimedia.org/wikipedia/commons/c/cd/Genseric_sacking_Rome_455.jpg

professororange

Here is the [painting in question.] (https://upload.wikimedia.org/wikipedia/commons/c/cd/Genseric_sacking_Rome_455.jpg)

grapp

I'm on my phone so I can't link to the painting