But if you&#x27;re an ancient man, what reason do you have for describing the color of the sky? Does it have any consequence on your life? Sure, it&#x27;s always there and it&#x27;s huge, but if the sky is blue... so what?<p>If it&#x27;s green, you have a reason to say it&#x27;s green. If it&#x27;s black, you have a reason to say it&#x27;s black. If it&#x27;s blue... who cares? It&#x27;s almost always blue, and it never indicates anything that you need to be concerned about. Kind of like an ancient, completely homogeneous society doesn&#x27;t need a word to indicate the color of their skin. It&#x27;s just skin colored. Until they meet another tribe with a different color of skin.<p>There are plenty of things we still don&#x27;t have words for the color of. Steel comes to mind. We literally just call the color &quot;steel&quot; because steel is always the color of steel. It&#x27;s not quite grey, it&#x27;s not quite silver. And silver is colored silver without a distinct word for it. Because the only way we need to talk about the color of steel or silver or gold is when they&#x27;re <i>not</i> colored like steel or silver or gold. Blued steel, rose gold, white gold, etc. But if it&#x27;s colored gold, it&#x27;s just gold. And if they sky is blue, it&#x27;s just the sky.