[Color Redesign] Soulbound colors
What is the enhancement in mind?
Show that an item is Soulbound in some way.
Notes
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.)
https://docs.google.com/spreadsheets/d/1BgQ_oKyd2V19ZJU3s0honsrQUNIcwUo2kcFhHcRLi4I/edit?usp=sharing