Which statement correctly matches NFPA Diamond colors to hazard types?

• A. Blue indicates health hazard; Red indicates instability; Yellow indicates flammability; White indicates special hazards.
• B. Blue indicates health hazard; Red indicates flammability; Yellow indicates instability; White indicates special hazards.
• C. Blue indicates flammability; Red indicates health hazard; Yellow indicates instability; White indicates special hazards.
• D. Blue indicates special hazards; Red indicates health hazard; Yellow indicates flammability; White indicates instability.

Answer: (B)

NFPA Diamond uses four colors to convey separate hazard types: blue for health, red for flammability, yellow for instability (reactivity), and white for special hazards. The white section can also show symbols for specifics like oxidizers or water reactivity. The statement that matches this standard is blue = health hazard, red = flammability, yellow = instability, white = special hazards. This is the correct mapping because each color is assigned to a distinct hazard category, helping responders gauge risk at a glance. The other options mix up these assignments, such as giving blue to a hazard other than health or assigning instability to a color other than yellow, which contradicts the established coding.