Does color have an objective existence?
Yes. But perhaps not in the way you are thinking. Color is defined as a human perception and therefore does not exist outside of humans. Objects and light sources do not have a color unless someone is there to observe them. (They do have spectral power properties that provide the stimulus for color, but the actual perceived color depends on those as well as attributes of the human observer.) That said, perceptions can be just as objective as physical objects. In the laboratory, we are able to complete repeatable, objective experiments to measure observers’ color perceptions. That makes the perception of color, and therefore color itself, an objective phenomenon … even though it is “only” a perception.
