Hector Martin

Well, your RGB true blue would be pretty eye searing across a whole wall…

I don’t actually want to paint a wall, even though that’s a house paint brand… I’d be fine with *any* kind of paint if it’s the right color.

You probably want model paint then, it comes in lots of bright colors, albeit in small doses

Hmm, thanks for the suggestion… I don’t know much about paint, but it seems to be hard to find actual color values online in a lot of cases

Colorimetry is hard. The mapping depends on way too many factors (e.g. what light you use), even if you assume sRGB on the RGB side. An unqualified RGB tuple is almost meaningless.

Colorimetry is hard, sure, but the difference I’m talking about is large enough that it doesn’t really matter.

The reason why there's no paint in pure sRGB corner colors is probably that it'd be too dark in normal lighting. If you only reflect a very narrow band of wavelengths as required, you're throwing away most of the spectrum. Things are always duller in reflective media.