The article deals with problems of color perception under LED lighting. We revealed that inadequate perception of a signal color by a driver led to greater risks of transport accidents. We reviewed both Jung-Helmholtz three-color hypothesis and a modern one based on fiber-optical approach to functioning of "Mueller cells and cones" system. https://www.spidertattooz.com/SNS-Dipping-Powder-Trendy-Grey-1-oz-NOS21-p35616/