Board Thread:Theories and Speculation/@comment-30355627-20161030164948/@comment-25122992-20161031175823

Well, Sasuke's chakra was stated to become very dark and cold by Karin, not sure if it has something to do with his hatred, but it's not surprising that his Susanoo, an avatar created from the user's chakra, is as dark and cold as his chakra itself.