Is one of them female, or 2 males?
I wouldn't worry too much about the serpaes, my rams boss them around, and they basically leave the rams alone. If they are still young it will take them a little bit before they develop full coloration. Food can also make a huge difference, I feed mine omega one flakes and hikari cichlid gold sinking mini pellets, among other things. It has helped to boost their colors too. Temperature wise I keep my tank at 80, and that is with cories and ottos.