Jason, what K-rating are your bulbs? I know this sounds ULTRA lame, but just by adding a bit "bluer" of a bulb, even the "tan" zoanthids I had seemed to turn to a richer hue of brown (like dark chocolate) just from a switch from 10k to 14k.
This, of course, is moot if you have 50/50 PCs. If that's the case, maybe get new ones? Newer PC bulbs burn a bit bluer from my experience.
I know this wasn't a lighting question that you asked, but I've always noticed that all the softies in my tank colored up when I replace bulbs.
FWIW, I DO have like four single polyps of these cool turquoise colored zoas that made it through the ice-storm. Once they get their numbers up, I'll trade them away. They were about the only thing in my old tank that I didn't give to folks - AND NOW, because I was greedy with them, none of my fellow reefers have any of them to frag back to me! :bum: So, now I vow to frag a lil more often once my tank has fragable corals...