Yeah they are, only thing I hate is that damn half-dome they come on since it makes it hard to put anywhere I really want it Luckily I managed to wedge it in someplace in front as my "center piece" coral... of course that's because it's the largest SPS coral I have now but either way nice pickup.
There were a couple others at Lucky Ocean (yeah go figure!) some thinner branched type coral (didn't know enough to ID) that had a similar color.
Well I've personally seen (in my very own tank) A purple (DEEP, unknown color polyps), lighter purple/blue (this picture), green with red polyps, pink with green polyps, pink with pink polyps.
The only color I haven't seen at all is yellow (i've seen what some have called yellow, but to me that's a bleached brown, aka TAN color ) and Orange ones
I think thats why this coral is one of my very fav's. it comes as widely varied in colorations and just when you think you've seen them all another color morph pops up...