[georgeecollins]

Right, you say additive and subtractive, I think of it as emmissive colors vs reflective colors. That point seems to get ignored.

Some of this is interesting-- like every color is a frequency. But human vision systems are probably not innately tuned to perceive every frequency along a chunk of spectrum with an equal weight. Training and cognition probably influence our acuity in certain parts of the range.

[traverseda]

> like every color is a frequency

Hot pink isn't a frequency. It does not appear in the visible light spectrum. You can only produce it by combining multiple "impure" frequencies. You generally produce it by combining a spike of low-frequency red with a spike of high-frequency violet.

Human eyes try to "triangulate" a complex spectral analysis into an absolute position in a colour space, that colour space is the surface of a sphere or torus or something, and hot pink is "between" red and violet. Three-coordinate colour space is very much an artifact of humans, and how human eyes/brains work.

[fmajid]

A sub-manifold of the Real Projective Plane RP2

[dathinab]

It's not just cognition but physical limitations of our eye.

Through the effect of cognition and training are wastly underestimated in my experience, like look into what the color brown is.

[jabirali]

Precisely. That’s also why our screens use RGB emittors: that’s the frequencies our eyes have sensors for.

Pictures shown on a human screen must look really weird for a species with different color vision than us...