you got yourself a badly colored female there. festaes have blue spangling on there fins but females usually dissapear. there is no spangling on your festae. the black dorsal also points to female but can be mimmicked by a male with deep protruding stripes into the dorsal to give it the black dorsal look. but that fish is a female
She's not badly colored, she's just in a different mood than those in full display. She's not with a male that she's interested in nor is she alpha, so you can't expect her to be in full breeding dress. Unless they are paired up or courting, you can't expect them to look their best.