I had a couple 2 1/2 gallon pails available with potting mix in them.  A viola plant died off and the bunching onions did not come up in the other bucket. I decided to go and get a couple pepper plants today at Home Depot garden center and spotted these peppers. I do not ever remember seeing purple peppers. These should go very nicely in my 2 1/2 gallon pails.
I just pulled up the info on them and I am quite excited about the random purchase. Especially the size of the plant to fit the pails and thrives in southern climates.

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https://bonnieplants.com/product/purple-bell-sweet-pepper/

Purple Bell Sweet Pepper
"Plant size: 18 to 24 inches tall, 18 to 20 inches wide"
"This pepper tolerates high heat and humidity and thrives in Southern gardens."