Let's say that, you the parent, decide to not teach your child about color. Let's say that, for the sake of the scenario, no outside force tries to intervene or attempts to mention color around this child. Putting aside all the morals and whatnot around this, how would this child turn out?
If I were to take this child at the age of eight, and said child had never even heard of color, and then asked him to describe the sky, how would he answer? Would he try to describe the clouds and their shapes? Would he try to describe it as "bright" or "light"?