15 May 2019
Callie, Customer ServiceThank you so much for your review! I'm sorry to hear you're having some issues with the Color Sensor. For tip top performance, make sure the sensor is tested in an area with bright and steady lighting while using bricks with varied color values. Black, Brown, Red, Blue and Yellow work the best! Still having trouble tracking the colors? Get in touch with our friendly giving us a shout at LEGO.com/service for some support for your sensor.