Apparently the Janie and Marie Antoinette dolls both have the same model but with different textures, including the color change on that dress.
I honestly think this might be a deliberate flub, since it’s a blink-and-you’ll-miss-it goof that ensures the film’s original version remains superior in at least one way. Plus the blue/pink dress color swap feels like it could be a tongue-in-cheek nod to Disney’s Sleeping Beauty.