Mine is just a little bigger (older) than yours and is starting to get more red. I feed mine Hikari Gold, Cichlid Flakes, Tetra Color Bits, and Frozen Bloodworms and shrimp. She really started to get more color when I added the Tetra Color Bits, my fish go insane for those little things.
Have you ever thought about getting a male for your little lady? I live an hour or so out of Wichita and was thinking about getting a male. I probably should hold off though. I got a convict pair awhile back and got tired of all the aggression and fry. However, I was thinking that true festae fry would be easier to sell or give away.
Great fish!