Bananas and coral glows undergo some pretty crazy color changes, so I wouldn't worry too much. They do sometimes pick up some white color blushing inside the alien heads, it's more prevalent in ones with pastel though. I know my CG specials picked up more white around the alien heads as they grew a bit more.
I would double check all of your temps and humidity ranges as a just in case and make a note of the skin for now. If anything else does happen that's concerning like swelling, weeping, loosing scales or sores then that would definetly warrent a vet visit.