Historical evidence reveals that humans possess the remarkable ability to render certain physical appearances invisible if they do not focus on them, including something as fundamental as a color. Specifically, the color blue. While our eyes can perceive among approximately one million colors, it remains unclear how differently each person experiences them.
Every language initially embraced words for black and white, symbolizing darkness and light, followed by red, associated with blood and wine. Subsequently, yellow and green entered linguistic lexicons, with blue consistently lagging behind as the last hue universally recognized.
