Ok, I'm sure this is a stupid question, but pity the poor soul that I am and humor me.

Is it normal for FBTs to change color (from the bright, almost neon green, to a darker olive/fir green)? The newest addition to my ever-growing "zoo" (and first amphibian) seems to change depending on mood, location in tank, time of day, or *something*. So far his eating habits are regular, with 4-5 s/m crickets dissapearing every few days. He's in a 10g tank with something close to a 3:1 water/land ratio, and spends most of his time soaking. The only physical problem I've noticed is his left eye, which seems to have been injured in the past, but it doesn't affect his food-finding skills as far as I can tell.

Thanks in advance to anyone who can shed some light on this for me!