What does the blue color on the diamond sign indicate?

The blue color on the diamond sign indicates a health hazard. This specific color coding is part of a standardized system used to communicate risks associated with hazardous materials. In this system, blue is traditionally reserved for information about health-related risks, meaning that materials labeled with this color may pose dangers to human health, such as toxicity or irritants.

In contrast, the other colors on the diamond sign represent different hazards: red indicates flammability, yellow is for reactivity, and white typically designates special hazards. Understanding these color codes is essential for ensuring safety in environments where hazardous materials are present, particularly in medical and industrial settings.