But I just hit a stumbling block. The 360 major computer generated hues do not fall neatly into 6 categories of 60. I made a little program to draw swatches for each hue so I could name them all; I was hoping to end up with a column for each ROYGBP. I shifted the spectrum so the hues were offset by 30 which helped a bit, but not much. There's too much Green, and not enough Yellow.
The visible spectrum image from Wikipedia looks much more balanced. I wonder if it's rendered in something more attuned to this than Processing, or if the person who generated it did some lerping. Either way, I don't think I'm going to use the Processing hues as the second tier of my color hierarchy. I'll hand-pick them. I'll deal with Magenta (which occurs in the color wheel but not the rainbow) by splitting it across Red and Purple.
Below the Wikipedia image are the spectrums from Processing and the ColorPy library I will be using in the near future. ColorPy is better, but still not great. Computer screens are a matrix of Red, Green & Blue LEDs— displaying secondary and composite colors by blending and gamma correction— which might also account for the Yellow deficit. I look forward to building my own spectrum, and finding the paint and light equivalents.