A new allergy

I like to joke that I'm allergic to the planet, but I've never had a food allergy. Till now, that is. It seems that I'm allergic to blue corn chips. Just the blue kind, not the white or yellow. Weird. I mean, I had them twice over two days and was covered with a bright red (but not itchy) rash both times. I'm SO glad Cool Ranch Doritos are not made of blue corn; I'd be rather put out.