When I was little I always thought the toungue twister went like this:
PETER PIPER PICKED A PECK OF PURPLE PEPPERS
I don't know why I converted those pickled peppers to a dark hue. At that time I never knew such a thing actually existed. At that time, maybe it didn't...it seems like it's just been in recent years that all these exciting hybrids have come about. Anyway, there is such a thing as a purple pepper. We grew them in our garden. They were a bit crunchier than the green variety, but wonderful nonetheless. I think we'll try planting them again this year.