Appearance/discussion of Necropolis units.

I have nothing against their "skirts"; I actually like them, and I like the undead's outfits too. But the color of the Archlich's robes in the first five minutes left me puzzled. It certainly looks beautiful, but for a Necropolis unit, it's a bit strange, to say the least. Their units have enough of that acidic green color, but switching to white...