Some of my favorite plants are still just simple colors:
Evening Enchantment has been at the top for years.
Charles Johnston is a beautiful red.
Steve Trimmer is my best pod setter and so lovely.
Mister Lucky is one that I'm not going to do without, I really love it. It's covered in pods!!!
Alabama Jubilee just glows and it sets pods great too.
This is just a few, all are older and all are in my top ten. So, I'd register that beautiful purple seedling with all of those branches. It would be very welcome in my garden. I have a lot more fancy ones but none more loved.