I've been continuing work with my color wheel using radial space filling trees, inspired in part because of DocBurst. I've modified the original source code to allow multiple levels of rings, though only three are seen here (the center circle is considered a segment, but I set it to the background color). Children sectors in the ring are constrained to the angle bounds of its parent.
Further steps include click detection on segments based to select different segments, and extracting a child segment to form a new color wheel.
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