Add a spectrum of color to your models with the new and updated Color Sensor. Detect an extended range of more than 15 target colors and program your NXT robot to react to each color. Build a color sorter to sort LEGO bricks or a line follower that will detect different color lines and surface colors. The HiTechnic Color Sensor is “tuned” to standard LEGO colors. When positioned over a surface, the Color Sensor will return a numeric value identifying the target color.