You feel that the color has shifted this way, or the colors have always been like this?
If the color has shifted, then look towards lighting. Heavy blue will not develop a full range of color in most coral over time - those coral that had it can lose it. You need full spectrum to develop all of the colors and then you can show them off with heavy blue for parts of the day if you like.
Try to add something big and bright in the middle! Perhaps something like a Forest Fire Montipora. Also maybe plant some more zoas on your vast sand bed, those are very eye catching and create more coloration to image we are trying to create! Good luck and I think it looks great by the way
Everything is blue.. sand, corals, rocks.. looks like things are growing decent enough, just can't see them. I 2nd a fuller spectrum. Add more "white" light so you can see the different hues and shades. As jda said, it will even look better(in time) during blue dusk/ dawn hours