The Color Sensor block gets data from the Color Sensor. You can measure the color or intensity of light and get a Numeric output. You can also compare sensor data to an input value and get a Logic (True or False) output.

　

Use the Port Selector on the top of the block to make sure that the sensor port number (1, 2, 3, or 4) matches the port on the EV3 Brick that the Color Sensor is connected to.

　

Use the Mode Selector to select the mode for the block. The Inputs and Outputs available will change depending on the mode.