What is the background color for warning signs?

The background color for warning signs is yellow. This color is specifically used to alert drivers and pedestrians to potential hazards and to provide cautionary information. Yellow is effective in capturing attention and is commonly associated with a need for alertness due to possible dangers ahead, like curves, intersections, or pedestrian crossings. In the context of road signs, yellow serves as a universal signal for caution, ensuring that road users are aware of any upcoming risks.

In contrast, orange is typically reserved for construction and maintenance zones, red is used mainly for stop signs and signals, and white provides a background for regulatory signs. Thus, the use of yellow for warning signs is both a standardized practice and an essential safety measure on the roads.