Originally Posted by willpell
The Erinyes are the exception, yes, I did think of that (and they're rumored to be corrupted angels so it fits nicely). But Duv's wing is white, though of course that could just be because the rest of her is. Oh, who's this Lieutenant and what's he doing in Baator? Does this have anything to do with the fact that Bugbears get their own god but Hoblins don't?
Hobgoblins do in fact have their own god (Nomog-Geaya) who watches over them and serves as their patron. The goblin god of cooperation and teamwork is Bargrivyek, who serves Malgubliyet (who is, incidentally, the god of caution and mistrust) as a steady right hand. Bargivyek is known as the Peacekeeper; he is Lawful Evil and makes his home in the Nine Hells of Baator in the ironically-named Peaceful Lands. Bargrivyek emphasizes unity to all of goblinkind and works to smooth over infighting between various tribes of goblins or species of goblinoid by directing them at their 'true' enemies, such as orcs, elves, humans, gnolls, and pretty much anyone that pushes goblins around. Through him, Malgubliyet politics with Baator, just as he uses the god of bugbears as a liason to the Abyss.
There's no canonical color for Erinyes wings, but the one pictured is white.