Nope, there are many colored illustrations. All, included slaves are light brown.
Except for Northern invaders (like Israelites), who are painted white and few imported African slaves.
Moreover, there are many descendants of Egyptians still living. The Copts are 100% descendants of ancient Egyptians, including using modern version of ancient Egyptian language, and even the Arabs are likely mostly descendants of ancient Egyptians.
I wasn’t aware of the illustrations. The Arabs I had thought were migrants from Mecca post 600 AD.