Most of the Sha have had a black-ish body with white-ish highlights:
The only major exception I can think of is the Sha of Fear, with purple body and red highlights:
So, since the Sha of Pride will be the final Sha, and presumably the worst of the bunch, I wonder what color scheme it will have.
Pink body with bright highlights is out though, because that will be the secret Heroic only boss, the much rumored Sha of Happiness!
[Edit] Stupid typo in the title that I can't fix.