There's 2 kinds of pink:
When a BP (of any color or morph) is going into a shed cycle, their ventral side (underneath, 'tummy') often has a pinkish tint prior to shedding...it's normal.
When an albino snake is small (young), they often look pinkish all over...that's because you're seeing their blood circulation showing thru their pale color, at least
until they get bigger & put on more "padding".
I'm thinking it's the second one you meant? You should see some other hatchlings, like albino king snakes...you can see all sorts of things thru their nearly-trans-
lucent skin & scales when they're young, besides looking pink all over. They do outgrow it.