O.K., so I've come up with the plan for the 4th and decided that the recipe someone so graciously gave me for r,w and b potato salad was a nice idea. I've been all over Manhattan and central n.j. looking for the blue potatoes. Kings has tiny bags of the three colors together w/4 blue ones in the bag, but I'd have to buy 10 lbs/ (3.99/lb) to have enough blue to make a statement, SO, what can I use instead of blue potatoes? I've got red onions (more merlot than red), but that doesn't count for blue. Help! I've thought of eggplant, but I can't see the combo. Come on folks, I know you can do it!