Corals grow when fed, and corals are fed by sugars. Sugars are supplied to them by the zooxanthellae algae within their tissue. Algae photosynthesise and warm coloured light, mainly reds grows algae best...
So unfortunately, the light that'll grow corals the fastest, is the warmer, lower kelvin number lighting. So a 8000k light will grow corals faster than a 16000k, but corals will look pretty rubbish under that, as it's the bluer part of the spectrum which brings out the colour.
So if you can get the lights nice and warm, with a kelvin of 8000k or so, then up the blues (blue light isn't a kelvin) to bring out the colours, then you've the best of both worlds.
So corals looking good isn't necessarily corals growing their best, and vice versa. Just go with something with plenty of white light, and adjust the blues to bring out colour to your taste.