on Color Detected

Run some code when the color you want to watch for is detected.

sensors.color1.onColorDetected(ColorSensorColor.Blue, function () { })

The color you choose to look for is one of the colors that the sensor can detect. If you want to use colors for tracking, it’s best to use a color that is the same or very close to the ones the sensor detects.


  • color: the color to watch for.
  • handler: the code you want to run when the color is detected.


Show an expression on the screen when the color sensor color 1 sees blue.

sensors.color1.onColorDetected(ColorSensorColor.Blue, function () {

See also

pause until color detected, color