After surgery.. skin color will change back?

Hiya everyone!
New here, with a 6 year old samoyed female called chupi :)
last week, she had a little surgery to remove a viral papiloma near her lower lip on the outside.
stitches already taken out.
As we all know, the outer coat of the sking  near the mouth is black, but now its pink and bare... do you think it will revert back to black when it heals?
my vet says yes, but im kinda dissapointed from her so i dont know what to think now..