Thats an "official" movie costume? I really doubt that. Buuuuuutt, I guess once they move out of the south pole that they will actually be wearing blue shirts but so far from what we've seen their outfits are no where close to blue.
Nooo...nobody threw up, tch. [keeper of Katara's sarcasm] [keeper of Mai's emoness] [keeper of Zuko's humor] [keeper of Ty Lee's intelligence]