Colored gear with specific classes.

[Estellios]

Not yet, now you just need a matching hat. :U
Key word: matching.

Well at least on the high level robes one color give you a small amount of magic potency and the other color gives you MND for presumably healing potency.

But then the matching hats are switched, so the robe that gives mnd has a hat that gives int, and vice versa.