Tongue colour?

Odd question. Do balls' tongues stay pink, or do they change with age? It seems like my guy's tongue is turning black, but I can't get a good look at it because I value my life and he's not too keen on things near his head, let alone poking around his mouth. So am I hallucinating, or does this happen? Do balls even HAVE black tongues? Help! :D

Far as I know they stay pink. Could be some random pigment? Are only the tips black? I've seen snakes with black tongue tips..

Its most likely just pigment the snake was born with, i dont think it has anything to do with age, i know a 21 year old bp and her tounge is as pink as mine.

Roxy has a bit of light brown coloring on the tips of her tounge.

Maybe I'm hallucinating. It just seemed last time I had him out that the tips looked blacker than normal, but he flicks it so fast it's hard to tell. I just thought I'd ask since I've never really seen that discussed before. Thanks for the tips. :D