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"because color is not out in the world but rather in the brain."

There is a definitive color in the objects, what changes is if someone has different cones they will perceive color WRONG. Color is not just "wavelengths" without appearance. (the coloured object has the appearance of color, that's why we see appearance of color) , without the color appearance existing in the object first, you would never see it later, that's how it works, any place which reflects light, will reflect the whole image already with color (with or without eyes to catch and brains to "perceive") If you have a disease in the brain's part of perception of color, you'll never perceive/understand the color that eyes are seeing.
Color, is caught by the eyes (and then perceived in the brain. The brain does nothing, just perceives/processes. I'm studying this area and I know a lot about it, I'm ready to get my PhD. and really upsets me when someone says about color/wavelenghts and objective world, without really understanding it. and knowing the difference about perception/reality.
Obviously color do exist in the objective world, without color existing first we would never see the appearance of color later. It's all dark and electricity in the brain, there are no "images" in the brain, the brain can't create something from "nothing", It NEEDS the objective reality and all appearances.
There is clearly only 1 color in every object. and if you have all of your cones/cells working properly you will see the world as it is.

1. Why do chameleons bother changing color if it doesn't exist?
2 If colour is only something perceived and doesnt actually exist, then what about colour pigmentation?
3. What about objects absorbing light and then reflecting what hasn't been absorbed as a certain colour?

this article should be edited to avoid spreading misinformation on the Internet.