i would go with two blue plus a purple plus and an aquablue the aquablues still hit some of the red spectrum as they are a full spectrum daylight.
i don't know how people with LEDs are faving issues with now red ,they are using white and blue. usually the whites are between 5000k and 8000k which have a good range of spectrum colors already in them.
but i would have to agree with joy, especially with SPS
corals, since they are in shallower reefs and closer to the top, the water filters out less of the suns spectrum so it would seem that they would require a much wider spectrum of light