Are you sure you’re not thinking of okLAB? okLCH is basically HSL, with numbers that are consistent. Not sure why those numbers wouldn’t be human comprehensible. You’ve got a lightness of about 62%, which sounds right - that’s how far between black and white you are at pure red. You have a chroma of 0.25, which you need to understand as being ‘quite high’ (0.33 is about as high as chroma goes), which I appreciate is a thing you have to learn, but it’s not beyond human comprehension. Most importantly if you lower that chroma you get colors that are as red, but less intense - which is what you would expect. And then you have a hue, which is an arbitrary angle. Add 180 to it to get a complement though, or add or subtract 120 to get to green or blue.
> 62%, which sounds right - that’s how far between black and white you are at pure red.
First, it's not 62%, but 62.8%, so that's already a fail at producing a basic color. Second, it doesn't sound right - you have no general knowledge/experience clue that this much light between black and white is red, so have no chance for a good guess
> I appreciate is a thing you have to learn, but it’s not beyond human comprehension.
Can you not appreciate that 0-100 is something that you almost don't have to learn?
> if you lower that chroma you get colors that are as red, but less intense - which is what you would expect
Yes, that's the good part!
> And then you have a hue, which is an arbitrary angle
That's another common flaw of all these color notations (they should allow "r" for red and then +-degrees for deviations), but it this case it's worse because it's again not a clean 29 number for a "clean" color
> Add 180 to it to get a complement though, or add or subtract 120 to get to green or blue.
If you remember the whole wheel. Not beyond "human comprehension", just UI fail for the non-expert general human
Such "pure" colors are foundational mental categories, or anchors, so that's only natural they should be the easiest - it makes working with colors more accessible
But they should all be easy, and your suggestion fails at multiple points as I've explained above, not only for red, so the I'm puzzled why you insist it should be that hard and want a proof of the opposite
