Board Thread:Naruto Discussions/@comment-1926479-20140929025618/@comment-1926479-20140929193053

Alright. I've been reading on forums that it's only logical that it would be red because Kishi would have mentioned something if they did two separate color chapters wrong and since Sasuke has the same eye as Madara/Jubi/Kaguya it's red.

I personally believe it's purple.