Bob,
As usual, from you, a superbly thought-out and admirably presented disquisition!
But I must, of course pick an infinitesimal nit:
The “color wheel” is often thought to be simply a circular representation of spectral hues - a linear series of a naturally occurring continuum of sequence of wavelengths of electromagnetic irradiation perceptible to the human eye - but actually it is not. In converting spectral hues into a “color wheel”, a non-spectral color must be inserted to close that convenient circle of “colors” , hence the invention of magenta - a lovely color, but not hue of the spectrum of electromagnetic radiation.
There, nit duly picked, but a wonderful read for a’that!

Dave