I was looking at that one myself, and was stumped over the different colors in the pictures. Some I love, and some I don't love. Decided to start a thread about the numbers after the colors in the color description.
The thread "What do the numbers mean in the plant description?" in
Daylilies forum
I've found a couple of color charts online that are supposed to show the RHS colors, but they don't match what I'm seeing in any of the photos.