Oh, btw; I don’t take that agreement on what objects possess which colors on faith; I check it out with others, and they corroborate that particular colors are inherent in particular objects. That’s what ‘agreement’ means.

Now they may be seeing what I would call green when they say red, but everything they see as what they call red I also see as what I call red.

And this red-green contention is highly doubtful, considering that vision is constrained within a single octave doubling of light frequency, centering around the color green. If we perceived light in multiple doublings, then we would see multiple colors from the same area, making line difficult to distinguish, with obvious negative evolutionary consequences.