Shiny Xerneas (Idea)

So I was in Photoshop class one time when I thought up of some ideas for what the 6th gen Pokemon's shiny form might be, and this is my idea of Xerneas. I was originally was going to do Yveltal, but I have yet to come up with something. For this one, I wanted to go with something darker for the shiny with white antlers (while keeping the other colors).