Tacos Rojos. ¿Por que?

So we went to Taco Bell last night, and when I get home and eat my food, my crunchy taco has a red shell. I'm wondering why. I felt like the Oompa Loompas were supposed to jump out and start singing, "You got a taco rojo!" And give me a golden ticket to explore Tommy Taco's magic meat factory. But I just ate it. I hope it wasn't worth a lot of money or something.