The pinkish belly associated with shedding should be pretty much the same each time. It would help if we could actually SEE your snake, and also, we don't know & cannot assume what you mean by "temps are good"-![]()
Be specific, because burns sometimes happen when you think they couldn't POSSIBLY have happened. Also, if your measurement device isn't accurate, that's another way to fail & end up with a burned snake. Burns are serious injuries & your snake cannot tell you how much they hurt- so it's important to KNOW for sure if that's what's going on with your snake. The fact that "it's a lot darker than last time" is enough to make me concerned, & it should make you concerned too.
And if you need to find a qualified herp vet (ie. -if you don't feel comfortable with what we can tell you here), this site may help: https://arav.site-ym.com/search/custom.asp?id=3661