Black is correct. Satin is probably a good bet, but I've seen them with a "gloss" finish too. It is probably somewhere between gloss and satin.
Beware if you send it off for "restoration". Many do cosmetic restoration only.... That may not be the case with passion4mopars now. I just looked at their site and I see they now offer "repair" too.
Earlier this year I pulled a non working headlight door motor out of my 300.... It was "restored" by a guy that everyone says is the best... Yea... right.... The motor was still full of years of crap... and abrasive from their blaster. I'll take a part without the correct paint that works over one that looks nice but doesn't work.