Regal, nice growth! As for Jim's cap.....I had the same problem keeping the deep green color. It would always turn an olive green/brownish color. After a year of scratching my head I realized it was my nutrient level. I had a tank that I didnt feed + I ran phosban. Most of my SPS were very light at the time. Blah Blah Blah
Basically if you want that dark green color on the cap and maybe deep colors on other SPS as well, you can either shorten your photoperiod, feed your fish more, or combination of both. (judging from your pics it looks like you have a low nutrient level)
OR you can leave things as they are because everything looks fine ...I just get silly when it comes to SPS