Help finding a color

So I'm looking at the dark vengeance lord and the new finecast sorcerer and trying to find a color for the cloak/robes to match my paint scheme. Any ideas?
Pic of some of my paint scheme.

A base-coat of whatever they call the old Festering Blue might look cool. I loved that colour.

Khorne Red springs to mind as a close match to the red you are using. It is a very deep red that tints slightly towards purple. I've been using it for my purity seals as of late.

that has possibility. any colors that aren't red or blue? between red n blue nids, red n blue marines n black n red/black/green(nurgle stuff) chaos my color diversity is somewhat lacking lol.

I've always liked white for chaos. Gives them a rather gritty look when done up right. You could also go for something in a pastel which would look odd and strangely chaotic. That said its always the case that black is the new black.

J

Maroon and Indigo? LOL

You could go for something like green and go for hi contrast with the red. Careful not to make it Xmasy.

Pink?
Denim Blue?

Moonfang Brown highlighted up to a light brown colour (like old snakebite brown, but brighter?)