I like the colours cain. And I especially like the addition of the Avatars of War Chaos Lord, an excellent choice k:
Really liking the colour on the Chaos, I love the deep blue along with the silver and bone colour, gives a kinda Tzeentchy feel. I would, if I was you, just layer up to that final highlight, at the moment it's quite a thick and extreme highlight, that would be my only real criticism on it.Here are 5 chaos knights
Here are some pictures of my warriors of chaos.
Yay Khorne! Love Khorne, if you're allowing nitpicking then I would just water the paints down and add a few more layers