A device that uses color recognition systems designed to alert distracted drivers/operators in non-moving vehicles, to reduce their time of response to unnoticed external environment color changes. The device provides a method to image a vehicle's external environment color change by detecting and analyzing color variations of the traffic light signals or proceeding vehicle's brake lights. The device can emit a sound and/or vibration when the device recognizes a color change and the operator of the vehicle does not react, as in the case of a distracted operator. The device employs a camera, an accelerometer, a buzzer, an algorithm, a CPU and a power source. The device can be installed on the windshield of a vehicle, fully integrated into a vehicle, or partially integrated, wherein a mobile device App may be employed.