The purple ears will stain your hands!
Look up Maize Morado. It has the hp gene which makes purple so intense it is almost black. It is used to make a reddish purple drink in parts of South America. This reminds me that I need to grow out my Maize Morado seed next year.
I grew Morado last year, first time growing corn. My seed came from Baker Creed. I harvested mine a bit earlier, cooked them and ate them like sweet corn. Not as sweet as regular store-bought yellow sweet corn but quite good. I don’t know whether it can be used as popcorn.
Here are a few pictures: