Every year, I always end up with a handful of hatchlings that do this. Typically they are stressed babies (i.e. dropped yolk sack, or hatched very small). However, occassionally we do have a perfectly normal hatchling do this as well. In my experience, if they miss the first shed with the other hatchlings, they usually shed around day 30 or so. I would expect your animal to get blue soon. With that said, I have a very small number that will wait until about 60 days to shed. Just keep offering food, and it will shed when it is time. This should not be cause for any concern.