If you're still looking for some beautiful blues, take a glance at blue gudgeon dartfish - a cousin of the firefish, shimmering in sky blue. Like the firefish, they can be shy and may launch out the top . . .
Also, take a look at the orange-back fairy wrasse, which also has jumping potential, but has a more active, confident nature. Magenta head, yellow-orange back ... and a peaceful cerulian blue lower half & fins. Not too big, either.
~Bruce