I get Disco yellow.
The Disco series comes in yellow, orange, red, and marietta colors. The marietta color is the second picture here (sorry for the picture quality, it is as pretty as the others if you like that color), I don't see marietta in the Park's picture. E and R seed company carries the mix and each color individually. Most of the seed companies I've looked at offer only the mix. Same for retailers of seed packets.
I see more marietta than anything else as seedlings at the retailer that does offer the single blossom type; the tag says they are Disco.
I don't think the bees, nematodes, etc care what color they are but I really like the yellow. The last picture is mine on a very rainy day - they just glowed. They are bright and happy on sunny days too.