IDK if this is helpful at all, but I like Wikipedia for a general knowledge of almost anything.
https://en.wikipedia.org/wiki/Redbreast_sunfish
They are probably my favorite sunfish as far as coloration goes along w/ the Pumpkinseed and Longear. Got a nice sized one yesterday (maybe 9") when I was fishing for bite-sized sunfish for bait. It had a really nice color to it that popped even after the sun was going down and I still had shades on.
I ended up throwing it back after I managed to fill my bucket w/ 3-5" Greens and Bluegills - ihad no need for it so I let it go. I still have a little guy in my bait tank, probably 3-4" or so.....kinda thinking about saving him for a native species tank, TBH.....I just love their colors