Mine were all green when I took them in, but quickly changed colors. One is dark brown, two are greenish brown, and one is almost tan.

Curiously, at least one is male. I woke up to the sound of bullfrog calling 3 feet from my bed. I'm confused as everything I've read says males have larger tympanum than eyes... yet all of mine are the same size or smaller. Also, it's like 20 outside, so definitely wasn't outside my window lol.