Board Thread:Episode Discussions/@comment-1512913-20180705132520/@comment-25122992-20180705205439

Well, I still think that manga form suits Momoshiki's character better because he generally retains his former appearance and, as some people noted, looks actually like a powered up Momoshiki and not like some Momoshiki-Kinshiki fusion. But yeah, the golden colour of his doujutsu bears no reasonable explanation, although it's possible that anime would explain something, since in th preview for the next episode we can see Momoshiki with the previous red colour of the Rinnegan even in new form (if that's not an animation error).