Good coloration is a symptom of a good tank, get your tank in good shape and the colors will follow.
Stable water parameters, good flow, good lighting. That's it, if you can keep that going the colors will follow. I think that many reefers are impatient and expect to see jaw dropping changes overnight, it doesn't work like that.
I have seen LED tanks with good colors as well as T5 and MH, the one piece of the puzzle that is the same, regardless of lighting used, is that the other two components, water flow and stability were right in line as well. I have always used MH but have had great coloration with almost all the lamps that I have tried.
I agree that a little N and P help with coloration. I have lots of fish and everyone that comes over always comments how fat they all are.
Also, keep your hands out of the tank, stop moving your SPS, commit to a spot, glue the coral down and let it be.