I like blues. My male is blue bar on yellow with red bits on his head, belly spots and tail stripes. There seems to be some faint green near the top of his dorsal crest, too.
Both - in the same lizard! My guy's a blue bar bloodline, and is capable of displaying handsome blue bars (the best example I saw was when he went to the vet and was not at all happy about it), but he generally tends more towards a red or burgandy bar. I've heard of panthers being, say, red bar for a year or so then suddenly "deciding" that they're really blue bar after all.