Nice fish Bro. my 4 azuls are 9-12"s and they usually get very blue when they are excited to eat. my tank has dark background and light gravel. Dark and dark usually works best for color. For a while they were washed out. They are in a 300. I swapped a eheim pro 2 for and x5 and o boy did their colors jump back (it has 3 filters on the tank). Something about the huge water movement that tuned them up. they are regularly blue now.Water quality is huge. It is also funny to see them play in the current, they swing into it and swim up to the dump tube.
Yeah I have 2 kids and 1 on the way. I hear that with the time thing.