EV3 basics course. Color Sensor. Stop on third line. Hack (part 2) - YouTube
Amazon.com: LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements : Toys & Games
LEGO MINDSTORMS EV3 Color Sensor (45506) NEW IN SEALED PACKAGE! | eBay
LEGO MINDSTORMS EV3
7. using the color sensor - The LEGO MINDSTORMS EV3 Discovery Book (Full Color) [Book]
Robotics Using the EV3 Colour Sensor in RGB mode | Winthrop Development Consultants Blog