I had one reefer tell me a year back something about higher phosphates having some to do with it coloring up more. I don't know how true that is and don't really want to be upsetting a lot of corals just chasing colors so to speak. I honestly haven't seen a lot on all this.
This is interesting, my phosphates got high and my torch never looked better. It is a Dragon soul and the gold just started to pop....maybe there is something to it....but it wasn't great for the rest of my tank