What does the NFPA color code blue indicate?

The NFPA (National Fire Protection Association) color code system uses a diamond shape with four quadrants to communicate specific hazards related to materials. The color blue in the NFPA system specifically designates health risks. This indicates the potential severity of the health hazard posed by exposure to the material, ranging from no hazard to extremely hazardous.

When firefighters or emergency responders see blue in the NFPA label, it alerts them to the potential health risks they might face while handling or being exposed to the substance. This important information helps ensure they take the necessary precautions to protect themselves adequately. Since the color blue is dedicated to health hazards, it plays a crucial role in maintaining safety protocols in emergency situations involving hazardous materials.