its not normal but green just means it has something upsetting its tummy but just watch it. if it gets lighter then you're good and they should whiten up you don't have to worry until its neon yellow-green and is really wet not chalky then you have to go to a vet


(i had the same thing with my little guy and thats what the owner of dark forest reptile of boynton beach fl (and long time snake owner and herp doc)