From early childhood, we’ve been taught to recognize the colors of the rainbow—red, orange, yellow, green, blue, indigo, and violet—using the iconic acronym ROYGBIV. We see them in nature, on color ...

The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor butterflies. But if you look closely at the visible-light portion of the ...

The color purple has long been a symbol of royalty, creativity, and mystery. But according to science, it's also something else: a figment of our imaginations. While it looks just as real as red or ...