[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor. Those Cadmium Sulfide lights sensors usually have a very wide swing of resistance when exposed to varying ...

Enter the Nix Mini 3, the pocket-sized color sensor that makes guessing games ... It pairs with your smartphone to provide RGB, HEX, and CMYK codes or even matches shades to major paint brands.