Of course the linguistic labels in English are arbitrary because their meanings are digital rather than analogue. That has no bearing on whether colour has a physical basis. Colour depends partly on the sensory equipment (which accounts for colour blindness) and partly on the physics of light reflections.

Frankly, it's bizarre that you keep pushing this anti-scientific line of saying that colour is "all a human consensus." Why not just take a prism and see how it refracts white light to produce the colour spectrum?

My point about aesthetic values is tied to pantheism, and the origin of the word "aesthetics" has no bearing on that. You're assuming something like metaphysical idealism, whereas I'm assuming naturalistic pantheism, so we're talking past each other here.