I guess it comes down to whether you think you can (immediately) process the "red delta", "blue delta", and "green delta" independently. I wasn't stating my ass

I guess it comes down to whether you think you can (immediately) process the "red delta", "blue delta", and "green delta" independently. I wasn't stating my assumption that I thought it would be nontrivial for your brain to identify more than the overall distance between the colors. I do agree there are technically 6 information channels; I just wasn't sure if a human could actually use it expediently. That said, I think I've come around to the idea that we could see multiple signals. I could probably identify "right-brightness" & "left-brightness" as separate from "right-desaturation" & "left-desaturation". But can I also separate those from "right-CCW-hue-rotation"? Can I pair it with "right-greenness/blueness/redness" in a way that I am gaining a full independent channel of information? Maybe it's like 2.2 channels worth. :P I guess I shouldn't speculate at all; it's easy to be misled in hypotheses about perception.