My specimen has gotten somewhat darker in captivity, but it's still beautiful. The red just isn't as striking anymore. I am going to try to feed it some salmon to see if I can get that intense red back. I recommend you do that (or krill).
BTW, my golden blenny decided to turn black on me :?
Lisa,
Where's your pics? I know you take wonderful images.
As for the gold turning black, its common behavior for the blennies off the coast here to turn bright yellow or gold during breeding. Not sure if its a sexual dimorphism or if its a temporary 'impress the ladies' thing, but I see it commonly.