Benham Disc

I use something called a "Benham's Wheel" to support my argument that color does not exist out in the world anywhere other than within your own nervous system. What we experience as color is a perceptual process formed in our nervous, not a universal quality or characteristic of the physical world. Our nervous system evolved specialized sensory cells which allow our brain to perceive the phenomenon of color because of the usefulness to us of the information that can be carried in the selective absorption and reflection of a narrow band of electromagnetic energy.