I think after you lose enough coral, you realize that the health of the coral must come first.
And for me, and probably many others, that means leaving corals lower in the tank to start. After you are sure they are not lightening up in your tank, you can start moving them up.
As said, other factors will influence color, mainly good water quality and good water flow.
A heathy coral that grows, will usually give you the best color that the coral can give. After it's healthy, move it up and some cool things could happen. I know some blues that only come out with bright light