Which color in the National Fire Protection Association (NFPA) 704 system conveys information about a hazardous materials special properties?

NFPA 704 Hazmat color codes:

blue -- health hazard (4 being deadly)

red -- fire hazard (4 being flash point below 73 F)

yellow -- reactivity (4 may detonate) and

white -- specific hazard (no water, radioactive, acid, alkali, corrosive, oxidizer)

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