Fair, coming from a physics/chemistry/biology background seeing the connection between the spectrum of light being seen and the color you convert it to was real

Fair, coming from a physics/chemistry/biology background seeing the connection between the spectrum of light being seen and the color you convert it to was really enlightening. I knew it had to do with phosphors, but the science is fairly understandable. The chemicals that pick up light respond to different wavelengths differently. However, if they get excited, they are a [1] (as far as I think we understand). So a single phosphor can't tell anything about the wavelength other than a probability distribution. Then you take three probability distributions and identify a single unique color in our heads for it. And that's why every color-space ultimately has three parameters, it's all just different projections and mappings but physically there's really just a spatially isolated signal that tells you which of three phosphors were hit and how much, and then a ratio to downsample it to a perceptual color. And then you look at the overlap and see how for wavelengths you see as blue, the "blue" phosphor is only about as active as the "green" phosphor (which are confusing misnomers anyway) but your brain sees both being active equally as "blue". And then that "red" secondary hump gets hit when the wavelength moves from blue towards violet -- activating the "red" phosphor and making vision into a wheel. It was always one of those "this is obvious until I think about it" moments when I wondered why 400nm and 700nm aren't ends of a spectrum in our vision rather than a wheel, there's no obvious theoretical reason for it I think. It's just a possibly pure coincidence of that "red" phosphor having a second hump. It's nice to do the conversion for real a few times with example colors or black body radiation. Seeing how this works a little closely makes a bunch of stuff like imaginary colors make sense biologically with saturating certain phosphors.