First off, thanks for that post! Much needed and very very helpful.
Two immediate things:
- Should one explain what an opponent color-space/representaion is and how rgb-primaries form the triangle in the CIE horseshoe, but chroma could technically lie outside of that triangle (whether this makes sense for display purposes or not would be gamut-clipping or gamut-remapping)? I have the feeling you left that out for clarity.
- this
Probably needs more discussion. Maybe not here though?! Because it
a) touches a spectral region which is for many color-models still iffy to do certain transform aspects in. This probably affects gamut-compression/remapping ‘performance’ or ‘quality’. And
b) it critically depends on what you call UV (380nm is well on the CIE-horseshoe, looks purple in real life as the horseshoe suggests and should definitely not be leaking out of a blue LED. Blue LEDs at the moment have at worst a 405nm center wavelength, not lower, usually they are very very bright narrowband 450nm lightsources. 380-450nm is exactly the spectral region which is…uhm…interestingly handled in many color-models). UV sources below 380nm tend to look very faint and pale blue to the eye, almost white and you should never ever look with your eye into it! I would be a bit surprised if 380nm LEDs are being sold at the moment…but their color should be represented as a purple hue and not nuclear-blue.
On ccd or cmos sensors, if the lens-glass is transmissible for such UV-wavelengths below 380nm (not every glass variant and not every anti-reflex coating is) it can have all sorts of contamination colors, not necessarily just blue. Just like IR-contamination will sometimes ‘only’ have weird colorshifts.
Also, I had to laugh at rat-piss-yellow! 
Thanks again Aurelien!
Cheers