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Question
We recently moved our chameleon to a new cage in which she did really good for the first week and in the last 3 days she has turned really dark. she still eats like normal, her basking temp is 90 degrees and her cool zone is @ 75 degrees. she also is at 50-70% humidity. I am at awww as to what is going on with her. I was told that the females lay eggs on their own without any help from the males, but have yet to find any data stating this is true. can you help me out so that we can get her back to her beautiful color?
thank you

Answer
A dark color for a chameleon is a sign of stress.  You may want to move her back to her old enclosure while you investigate.  As you probably know, chameleons are quite delicate animals that cannot take a lot of stress.

A number of things to investigate:
Are there any reflections?  (Chameleons can't be kept in glass cages, as they will see their reflection, and this may stress them).  
Chameleons also need high air flow, as they can become ill quickly from mold spores and bacteria in the air, if it's stuffy.
Is she in a high traffic area?  Chameleons can be easily stressed by too much activity.  It could be as simple as having an open versus solid back and sides--try covering the back and sides and see if that helps.
Make sure she is  well-hydrated.

I don't know of any known cases of parthenogenesis in female chameleons, though they can sometimes lay infertile eggs.  Gravid females will be seen pacing and digging on the cage floor as they search for a nesting place, and should be given a proper container with moist soil to lay eggs in to avoid egg retention and egg binding.
Gravid females do not turn dark--they take on a more vivid color with bright orange spots.

If none of the things I've suggested above turn out to be the issue, then I would recommend taking her to a veterinarian for a checkup.  Given the fragility of chameleons, catching a problem early is the only way to get a good prognosis, and you'll want to rule out her being ill as a cause of her distressed color.