MaudDib,
You are concentrating on colours as they are
perceived, and I don't disagree with anything you've said so far.
However, my question is do colours exist in and of themselves? Were there no people to see tomatoes, would they still be red?
Is red anything other than a construct of our consciousness to designate certain objects that reflect particular wavelengths of light?
Maybe I'm arguing with shadows...
Mr Mephisto