In the NFPA hazard sign, what does the color blue represent?

In the NFPA (National Fire Protection Association) hazard sign, the color blue is designated to indicate health hazards. This means that the blue section of the sign provides information about the potential health risks associated with a material or situation. The scale used typically ranges from 0 to 4, with 0 indicating no hazard and 4 indicating a severe hazard that could result in serious health effects upon exposure.

The understanding of the NFPA hazard sign is crucial for first responders and anyone handling hazardous materials, as it helps them quickly assess the level of risk and take appropriate precautions. Recognizing the significance of each color in the NFPA system can ensure better safety practices in the handling and response to hazardous situations.