What do blue and white signs typically represent?

Blue and white signs are indicative of mandatory actions that must be taken in a given environment. This means that when you see a sign featuring these colors, it is conveying that specific behaviors or actions are required to ensure safety, compliance, or proper operation within the area. For example, a blue sign could instruct workers to wear personal protective equipment or to follow a certain safety procedure, emphasizing the requirement for compliance.

In contrast, signs representing danger or hazards typically use colors such as red or yellow to alert individuals to potential risks, while prohibition signs are often displayed in red, signaling actions that are not allowed. Information signs, which might be green or another color, primarily serve to provide guidance or useful information rather than mandate actions. Hence, the blue and white signs clearly serve the purpose of indicating mandatory requirements, making this choice the most accurate in defining their significance.