I've seen plenty of top level PLers and a few IFBBers in person. Many of them do have that purplish blue color to them as a result of massive overdoses of drugs (AAS to be precise). The blood becomes so thick that the skin starts to change colors. It's more noticeable in National level NPC BBers. Those guys are basically force fed them by sponsors. Sad if you ask me..
I fully believe Rex is part cybornetic organism =)