TCS34725 RGB Color Sensor For Arduino https://www.dfrobot.com/product-1546.html https://www.dfrobot.com/wiki/index.php/TCS34725_I2C_Color_Sensor_For_Arduino_SKU ...

Was tested recently and works, at least with an Arduino UNO r3 board. As specified and necessitated by the sensor, external calibration is required for absolute accuracy. Connect the Arduino board ...