I didn't know jet black was a skin tone choice in the sims.
That is his skintone and not some temporary textures glitch.
I posted a picture of a proprietor in my Dynasty thread - he's all black as well.
I'm noticing it seems to affect
only the proprietors in town, too. 3 Simfest Performance notices this weekend yielded all black proprietors.
No CC, no mods, only patterns from the Exchange.