What color is associated with prohibition signs?

The color red is universally recognized as a symbol for prohibition and warning signs. It is often used to signify danger, stop conditions, or actions to be avoided. In the context of signage, red communicates urgency and the need for immediate attention, making it an effective color for prohibitory messages, such as "No Swimming" or "Do Not Enter."

This association has been established through consistent use in various safety and traffic regulations worldwide. Utilizing red in prohibition signs helps ensure they stand out and capture attention quickly, which is critical for safety in environments such as swimming areas or public spaces where risk management is key. Other colors like yellow and blue play different roles in warning and informative signs, but they do not carry the same connotation of prohibition as red does.