Apropos fourmilab, just be warned, years ago the site had errors around whitepoint handling, some later fixed, some clearly not. That Figure 2 has the whitepoi

Apropos fourmilab, just be warned, years ago the site had errors around whitepoint handling, some later fixed, some clearly not. That Figure 2 has the whitepoint label "W+" very offset from the rendered whitepoint (the Y crossing). My very fuzzy recollection is it was this specrend code that was behind the oops of a "The Universe is green!" NYTimes front-page(?) article - someone's research generated spectra, and for PR they derived a color using off-the-web code, but didn't recognize the bogosity of the output value. Red-shifted faces. The Wikipedia discussion of violet[1] currently seems plausible - yay. Unlike the "Black-body radiation" article,[2] which again has a CIE chromaticity diagram with a blackbody curve going through yellow and missing white, which is indicative of broken whitepoint math. Oh well. > This mapping of wavelength to RGB value is very misleading As is so much science education content. It can be fun to imagine how different science learning might be if content wasn't so broken. [1] https://en.wikipedia.org/wiki/Violet_(color) https://en.wikipedia.org/wiki/Violet_(color) [2] https://en.wikipedia.org/wiki/Black-body_radiation https://en.wikipedia.org/wiki/Black-body_radiation