Chameleon Scarf...
Adafruit, which posts the geekiest, most wonderful... ...own "chameleon scarf," an accessory that changes color to match your clothing. The scarf itself is incid... ...elf is incidental, because what blew my mind is a sensor that detects the color of an object -a piece of fru...
https://www.neatorama.com/2013/05/22/Chameleon-Scarf/
