all of mine are doing well, however the coloration now ranges from blue to green. not the normal green of the green iguana but a darker green. I think the coloration is affected by a combination of heat and humidity as i have 5 different cages set up and for the most part the ones in the screen cages appear to be more greenish than blue or turquoise. as for retaining color, i guess only time will tell. all of mine are eating well and all appear to be healthy and active. I will try and get some decent pics this weekend and post some.