Rob and I tried blue (or was it green?) ketchup back when it came out. I thought: It's ketchup! What's the big deal?
But there was something unnerving about the color that just sent the wrong message to my mouth and brain or something. I could. Not. Eat. It. I tried, but I swear, even French fries dipped in it tasted awful. I think we eventually threw it out, mostly unused.
Matt of X-Entertainment had a much better relationship with the stuff, though, which he details here.