Perhaps Daryl, your college students will find more stimulating than mine the uniqueness of extraspectral magenta. It does not exist in the rainbow nor as a monmochrome yet our sense of chrominace is maximum for magenta whereas our sense of luminance peaks with its complement, green. How come all the "pure" colors on the rim of the UCS or CIE horseshoe or tongue can be either monochrome or combination of primary colors but not along the magenta line tying UV to IR. Does it exist ouside the human mind? Does sound exist in forest free of humans?
"Sophisticated" students might tie color theory articles by J Nathans and by J Murch and calculate the depth of hue from red to blue that Murch demonstrates then find the difference in transit time equals the period of vibration Nathans measured.
If they do not turn"em on to color theory, I can't imagine who could.
JJ Stapleton, Pte
Adj.Prof.Math.Dept.
Kean University, NJ USA