I have 2 WC anoles from sunny FLA. My husband thought they were geckos . We don't talk about it
FLA and the Carolinas are infamous for both the green and the brown anole. I have 2 brown anoles. Yes, they do change in color- and quite quickly too. Is it possible you have a brown anole?.... I think the stress might be yours, as "he" will never turn green!
They are in a well planted 20gal long,(should be larger, but I don't have it at the moment... anoles occupy a good deal of space in the wild... about the size of a medium bush or 1M sq) with peat/orchid bark/sand substrate. They will rarely drink from a water bowl, instead relying on the vegetation being misted three times daily. This also keeps the humidity level up... keep thinking FLA. I do have UVB lighting (Reptisun) x 12 hrs at the moment, a "black light" to provide incandescent heat on one end of the tank, and 2 IKEA halogen spots to help even out the lighting. The anoles favorite spot is hanging upside down below the halogens. The feeders should be dusted, much like the leo's. It's a little harder to vary the anole diet... i did toss in some mealies and beetles. Hope to get a few fly larvae in there soon. Plan to try silk moths as well...