Help with whites tree frog!!!asap!!!

[artes]

You're right, she is quite purple around the gills. My suggestions are:
1) Screen lid. Sorry if I sound like a broken record, but my fish turn that shade of purple around the gills when their water isn't oxygenated enough, and really, how different are fish and frogs? They both start with a F! >_> <_<
2) Possibly constipation - maybe she ate too big of a bug, or too much substrate (could have happened before you got her). Try giving her a warm bath (I don't remember water temperature offhand, I think 75-85 range) and see if she poops. If she doesn't, add some honey or pedialite to the water.
3) Try getting a tall, spinny (oscelating?) fan, and aim it so it occasionally blows air right over the tank (not down into the tank, just across the top).
4) If none of the above works, see if there's an exotic vet in the area. It could maybe be a parasite (something she would have picked up before coming to live with you).