What color are eight-sided traffic signs typically associated with in traffic regulations?

Eight-sided traffic signs are universally recognized as stop signs, which are critical for traffic safety. These signs are colored red, a hue that is highly visible and effective for attracting attention. The red color signifies the requirement for drivers to come to a complete stop at an intersection or at the point indicated by the sign. This immediate recognition helps prevent accidents and ensures that drivers understand the urgency needed at such points.

Other colors indicated in the options serve different purposes in traffic regulations. For example, green typically denotes go or indicates permissible directions, blue is often used for informational signs such as rest area indicators, and yellow advises caution, marking signs that warn of potential hazards or changes in the road conditions. Thus, the red color of eight-sided traffic signs distinctly conveys the essential message to stop.