@Zetherin,
I didn't read through the entire thread so sorry if I'm repeating anything.
There is a difference between a color as a particular wavelength of light, and color as a subjective experience. These two are correlated (such that a specific wavelength will always produce what
I see as "red") but they are qualitatively different phenomena.
I would argue that my experience of red has no existence outside of my mind. Without a brain or mind, redness is merely a certain motion or pattern of light waves.
Take the parallel example of a bell ringing. There is a specific atmospheric disturbance that the bell causes, which
causes the sound in my mind, but the subjective "ring" that I hear has no existence in extra-mental reality (the physical world).
After some thought this makes a lot of sense, we can't say what things in the physical world
feel like outside of nervous systems, for instance, or what they
look like outside of visual systems. No subjective qualia (I'm assuming most have heard that term) can be reduced to purely objective physical phenomenon.
The better question is not whether things like color exist in the outside world, but the mind-body problem itself: how seemingly only neuronal processes in the brain give rise to this subjective character of experience.