Board Thread:Naruto Discussions/@comment-4682609-20140806081616/@comment-26302001-20140808095017

it will probably be a shade of white, as it was shown and hinted than Kakashi and his dad had white chakra hence they could use the white chakra sword.. they could channel their chakra though the blade and it was always called white. So I am going to assume it will be either a gray colored susanoo or a whitish one.