Physicists and vision scientists are lining up behind a provocative claim: the rich color we call purple is not a property of light at all, but a story the brain tells itself. Light in the real world ...

You might say it’s just a pigment of your imagination ...

If you’ve been driving down the road at night and wondered to yourself, “Why are these streetlights purple?” — we have your answer.

ORLANDO, Fla. – By now, you’ve probably spotted at least one streetlight turning a blueish-purple hue while walking or driving in the evening. No, they’re not meant to be that color. While the lights ...