Is Cinderella's famous blue dress in the animated Disney film based on any historical clothing, or is it just whatever the animators thought looked nice?

As part of a general discussion of ballgowns with my much-better-informed wife, I bought up how my principal mental reference for such clothing was Cinderella. She pointed out that to her, it didn't seem to fit any era in particular, instead combining elements of Regency and Victorian English ballgowns with some French touches and overly-exaggerated poofy sleeves. That got me wondering, is there any historical basis for her iconic look, so to speak? As a bonus, what about other Disney princesses?