Yeah, I know that Upset Plots are a better choice for data visualization — as everyone is pointing out — but take a moment to appreciate this beautiful etude for what it is. This nicely executed. I love how this forced the author into some very difficult choices about how to create a large set of convincingly "mixed" colors — which is a very difficult problem even with just 4 overlapping base colors!

In some sense, they "lucked out" by dealing with a prime number of primary color sets, which helped them avoid having multiple pairs of colors that are directly across the wheel from each other.

Very nicely done. It's fun to play with, and inspiring to study.