Color theory is a wide subject. The context it was used in this discussion was for design and the influence of colors on the end user for things like UX, branding, etc. Yes, color theory also includes important and technical things like color spaces and human perception but that's not what we were discussing here.
To quote the OP: "How different colors mean different things (Branding-wise or for alerts/errors/warning)"
And, maybe I am wrong about this, but it seems like you've never even heard of color psychology since you seem to think that it's completely unrelated to color theory and that it's a strawman I cooked up out of nowhere. It's even linked in the related section on the wikipage for color theory https://en.wikipedia.org/wiki/Color_psychology
To quote the OP: "How different colors mean different things (Branding-wise or for alerts/errors/warning)"
And, maybe I am wrong about this, but it seems like you've never even heard of color psychology since you seem to think that it's completely unrelated to color theory and that it's a strawman I cooked up out of nowhere. It's even linked in the related section on the wikipage for color theory https://en.wikipedia.org/wiki/Color_psychology