The video explores a historical misconception about the colors of the rainbow. When Isaac Newton divided light with a prism, he labeled the spectrum as red, orange, yellow, green, blue, indigo, and violet. However, his definition of "blue" differed from today’s understanding—he referred to what we now call cyan or teal. The color we recognize as blue was then termed "violet," aligning with traditional phrases like "roses are red, violets are blue," where "blue" meant a deep, dark hue.
Newton included indigo in his sequence, possibly to match the seven notes of a musical scale, though modern science often considers this distinction unnecessary. The video highlights how language and perception have evolved over time, reshaping our view of color. It uses visual examples and historical context to illustrate that the rainbow's color divisions are not purely natural but influenced by human interpretation and cultural framing.