Eh, orange-ish... Okay, sorry to offend you...I'll never make the mistake of calling Knuckles orange again. At least I know Sonic is purple. (Kidding, of course!)
One thing I always hated was that Sonic couldn't breathe under water. I know it made the game "better," and more exciting, but timed situations in games always scare me...and I hated that. I'd always end up drowning.