Got a couple of the atropurpureus. The color is really interesting in that it seems to be extremely dependent on the way the light hits it. Beyond the color looking different from different angles, they can also change their color at will. I saw this male today, switch from bright blue to a deep copper color without even flinching. Unfortunately, I'm having a really hard time capturing how bright this fish is on camera, and sadly the last blurry picture is the most indicative of the color viewed in person.
He gave me what he thought was a sexed pair but i havent gotten another good look at the female. Got a few more coming tomorrow, I'll take a closer look.