What color is typically associated with prohibitory signs?

The color red is typically associated with prohibitory signs because it universally signals the need to stop or refrain from certain actions. This is consistent with traffic regulations where red is used to indicate restrictions, such as "No Entry" or "Stop" signs. Red effectively captures attention and communicates important safety messages, making it an ideal choice for indicating prohibitions on the road.

In contrast, yellow is often used for warning signs to caution drivers about potential hazards, green indicates permissive directions like go or designated routes, and blue is commonly associated with informational signs, such as services or places of interest. Each of these colors serves a distinct purpose in road signage, but red remains the standard for indicating prohibitory actions to ensure that drivers know they must comply for safety reasons.