Here you can get a vast collection of the product from Color light Sensor. A colour sensor is a type of “photoelectric sensor” which emits light from a transmitter and then detects the light reflected back from the detection object with a receiver.
A colour sensor can detect the received light intensity for red, blue and green respectively, making it possible to determine the colour of the target object. The colour sensor can distinguish between colours or measure the intensity of the reflected light, making it ideal for line following. It is used in applications, such as medical diagnosis, colour printing, computer colour monitor calibration, and cosmetics, paint, textile and the process control of printing materials.