Males in season tend to turn orange , females can too , due to the increase in hormones during mating season. Cedro is an exceptino and stayes orange as he never really went out of season. This has made for a difficult situation for us because he is very dangerous. I have been unable to pet him in over 4 years. It is rare but it does happen.
If you are unaware, let me warn you. Iguanas go into season every year. Females develop eggs, and males spend a couple of months looking for a girlfriend. Males can become very very aggressive and females can develop emergency medical issues due to the eggs. The eggs develop even if they have not mated with a male and sooner or later most require a spay, even if they have laid eggs without problems in the past. This is a very expensive surgery, I have paid over $600.00 for 2 of my girls, so if you have a female ig start saving now because eggs problems are life threatening :/