Board Thread:Theories and Speculation/@comment-6769189-20150307180344/@comment-6769189-20150309145814

Orange, red, yellow, and even blue are within the normal fire color spectrum. I dont recall a green fire in Naruto. Amaterasu is also the only one that is black. Blaze can't be Fire+Lightning because nothing within Blaze has any characteristics of Lightning. If its not a Fire-Yin mix, it could be Yin enhanced Fire.

Kakashi enhanced Raikiri with Kamui.