[QUOTE=suzic1163;37156]I agree with suzic, I have 13 Grays since they were tadpoles and when they were tiny froglets they were almost solid green with out any patterns. Then as they have gotten older 3 months old now and between 1/2" and 1+" they vary considerably. Some are still green with a patteren, some are still small and solid green very faint patterns and some are light gray to dark gray and everything in between that.
Depending on the size, age, etc. and when you brought him/her in they will turn dark due to the stress of the change. Some of mine stayed dark for weeks..up to a month or two , while others took only days to get used to their new diggs.
Give your little fella some time and plenty of greenery and he/she will turn green again soon.
Oh and light also with cause your froggy to lighten or darken too, as well as the humidity and if they are in or out of their water bowl too.
They can be stubborn creatures so he/she may never turn that beautiful shade you found it wearing.
I took several in based on their exquisite colors and after bringing one in never saw it again, but I could never send him/her back into the Fall cold now, very shallow of me!LOL