Alright, im trying to figure this one out, and i have no solid ideas at the moment. my girlfriend's camaro is black, and is known to have been repainted at least once. the engine bay, door sills, nooks and crannies, and i believe the rear shock towers were either black or primer on the inside, as well as the door frames. however, the under side is a mix of dark green and primer, and appears to be the typical factory overspray, and there are a few other parts that have green on them. i didnt scratch any of the paint to find out for sure (she would kill me). im wondering if the car started out as green and someone did an epicly awesome job of repainting it, or if there might be a bettery explination for it. i removed the rear most crossmember, just behind the cat, and the matching green over spray was underneth it. i thought maybe it was black, green, then black again, but under parts suggests it was factory.

 

Pull up the door threshold piece and peek under the carpeting. You can usually find the factory original color there.

 

isnt the color code in the option codes? check here see if it helps.
http://www.chevy-camaro.com/chevy-paint-codes.asp

 

were pretty sure its black under the carpeting. i think it was black under the rear seats when she removed them to recover them. the rpo sheet is missing

 

There's no body info label on the drivers door?

 

there is the one with the gvwr on it, and i think the air bag warning sticker. but there is no rpo in the console, glove box, or under the rear plastic peices in the trunk

 

its probably been re-painted then