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THERE IS COLOR.

To avoid misinformation I will clarify all of this.

THE TRUTH ABOUT COLORS YOU FIND WITH ME. HERE (I'M PhD NEUROSCIENTIST AND RESEARCHER ON THIS FIELD)

Colors exist independent of us, colors are caught by the eyes, what Frank Heile says is correct, the brain just perceives, qualia (is what tell you that what you are seeing IS red, not blue), people with a disease in the part which processes color in the brain can't PERCEIVE and understand what color is, they can't process color in the brain (can't understand color), but still seeing color with their eyes, yes, color is caught by the eyes, and perceived in the brain. Colors are caught by the eye, colors are caught by a camera and everything that reflects light. IT'S NOT DEPENDENT OF A BRAIN TO "create" the apperance. the appearance of color is ALWAYS in the object, and I will repeat again, ALWAYS in the object.
Blue/Gold dress is all about how people react, because of slight differences in their rod/cones, different contrasts resulted in differences in the dress (if you understand photoshop you'll understand it), but the objective color in the dress remained the same, the dress is blue and gold.
It's all dark in the brain, only electricity, no images, no color, NOTHING,
We need the objective world to create a subjective one, Our minds don't create if not by the objective reality (blind as an example), for we can not fathom a new color, or imagine a completely new and alien sound, unless without experiencing it first. The world is full of subjective illusions, yet the objective world itself isn't. We see exactly how it is. Without color existing first we would never see the appearance of color later.
Even Jellyfishes who has only eyes (don't have a brain) can see color, and changes color to attract their prey. another example are the chameleons, why do chameleons bother in changing their colors? because colors EXIST objectively.
obviously if they lack rod/cones they won't perceive reality how it is, It's relative to your biological hardware that evolved to see color. Such as your cone cells.. If you have more red cones than someone else, you’re going to be able to see more shades of red. If you’re lacking green cones, you’re not going to be able to see green (such as colour blindness). Color exists out in the world.. but how we perceive it is relative. Luckily for us, through our evolution we’ve developed full color vision. Although, your brain can really jack up the signals being interpreted.. such as synesthesia, our brain isn't creating, it is interpreting.