The concept of color, and what is visible to the human eye, is impossible to comprehend. For all we know, everyone could see colors completely differently. I might see a color and call it red, and someone else might see a completely different hue but still call it red, for that is the universal name.
In preschool, everyone’s teacher would repeatedly point around the classroom while the children chanted, “blue, purple, yellow.” Kids would also memorize the rainbow – R.O.Y. G.B.I.V.
However, even though everybody might see a color and call it green, they could all personally interpret it as a different color. It could even be in a different color spectrum, which is not comprehensible.
This is impossible to imagine, for people think in color, and if one has not seen a color, it is impossible to picture it. The fact that everybody might see the world in varying ways is insane within itself, along with the realization that if that’s true, it cannot be proven. Any scientists attempting to do the experiment would also interpret the colors in unknown ways, and as a result there would be nothing on which to base the experiment.