From a 2015 interview by Drew Taylor with directors / writers Jennifer Lee and Chris Buck: Question: Can you talk about developing the look of "Frozen Fever"? It's kind of fun to see the kingdom with a springier color scheme. Chris Buck: We got a lot of our team back together to do the film, so our art director was back and we gave it that "Frozen" ...


Well, weather wise, they went from winter, to spring. Blue to green. It also reflects emotional differences.

Only top voted, non community-wiki answers of a minimum length are eligible