Is it possible to have discoloration from old areola after breast lift? (Photo)

I had a full breast lift and augmentation a year and a half ago. The scars are now pretty light, however the skin all the way down the length of the vertical scar is a darker color than the rest of my skin. Is it possible my surgeon did not remove enough of my original areola skin and that is causing the discoloration? I noticed a couple hairs that are similar to the ones around areola there too. If so would it be reasonable to expect my surgeon to fix it without it costing me a new surgery fee?