Missed this good series of questions for a while but: * The "?" about link says a lot of this. * It was an old idea that somehow solidified recently, after spe

Missed this good series of questions for a while but: * The "?" about link says a lot of this. * It was an old idea that somehow solidified recently, after spending enough time with color wheels and other things, to assemble this. * This is initially based on an HSL (hue/saturation/lightness) color wheel arrangement. But several web colors have identical H/S, so I tweaked it to spread those (especially, as you noticed, the greys) out artificially. * One of the things I wanted was to use a "real" (HSL) arrangement, to leave the values arranged visually. Close colors are close on purpose, so e.g. you can see that e.g. "tan" is a little silly, by how small its area is (there's a lot of colors very close to it, crowding it out) as compared to e.g. "crimson" which is large (not many reds, around that hue).