Identification help please

[redross]

Hello!!

I would like help to identify one of my frogs.
A while back I bought what I thought was a Hyla Cinera - American Green Tree Frog.
But I am not so sure, first of it's brown, again I am no expert so I dont know if it comes in that color to.
But now this week I bought another pair Hyla Cinerea from a different seller and they were green like I recognize from all pictures I have seen.
Also I have noticed they have different sounds when they call.
I have enclosed two pictures and I would be very grateful for all help I can get.

Thanks