Board Thread:Theories and Speculation/@comment-27075290-20160214063402/@comment-3568954-20160310123657

what we see isn't actually Kurama's chakra what we are seeing is Naruto's chakra. karin stated that naruto's chakra is orange and warm, kurama's chakra is a reddish orange. when naruto enters these modes he does so by absorbing a small amount of kurama's chakra and then transmutes said chakra into his own chakra signature. this is why both Naruto and Minato had a similar chakra mode.

and since he can transmute chakra its safe to assume that the change in appearance is simply what naruto wants it to be. for example if he wanted the chakra mode to have the appearance of a kimono he could or if he wanted to take on the appearance of say a samurai outfit again he could