[Color Redesign] Soulbound colors
What is the enhancement in mind?
Show that an item is Soulbound in some way.
Update the colors for soulbound items (and fix a few other colors) to be more consistent.
Note that doing this may need us to reset the cache when a user levels up, gains a profession (level?), reputation level increase, possibly more. (Some of these may only apply when we start covering more than just transmog stuff.)