They were Delta Blues. They get their purple color from the same antioxidants as blueberries and they're supposed to be perfect for mashed potatoes because of their texture.
How the hell could you even see them?? That restaurant was so dark that I hadda move my menu to a place under a spotlight to read it. (That spotlight was in between me and Mr. Babe - I joked that they put it there because thats where the check would end up... we both looked at the spot and slowly moved away from it).