Males are able to breed at 6 months, females 8-9 months. Needless to say, it is unhealthy for the females to be breeding at that age, because they need to finish growing.
I have somethings I would like to point out. One, you have been caring for chameleons for 2 1/2-3 months, not nearly enough time to master husbandry enough to consider breeding. I'm not saying your care is not good, but three months experience is not sufficient enough to think about breeding your pair. Also, mixed morphs, while very good looking for the most part, don't have a great market. They are really good for pets, but if people are wanting breeding stock, they will buy pure bred. Another thing is that if people bred mixed morphs, it spreads out the characteristics so much, that you could have a clutch, that has 4 a different morph's blood.
Here is something to read as well:
https://www.chameleonforums.com/some-thoughts-breeding-2612/