There are different reasons why your product changes color: 1. It has turned bad: If this is the case, a foul/sour smell should accompany the color change. 2. If you do your aloe vera gel and let it sit for too long before mixing it in your product, it will oxidize and turn to a pinkish color. If you just cooked your product it should not be a problem on your skin but if your product is already a week old or you haven't stored it a refrigerated area, it is safer to avoid using it. If you are not sure which situation you are facing the safest is to avoid using the product and create another fresh batch :)