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See Chinese contents: GB/T 37230-2018 GB/T 37230-2018: Societal security -- Emergency management -- Guidelines for colour coded alerts
This Standard specifies the colors and their coding that express the degree of hazards in emergency early warnings, as well as the basic requirement for the consideration of factors like color blindness. This Standard provides guidelines for the use of early warning colors to express the severity of dangerous situations for people at risk and emergency responders. This Standard is applicable to early warning of any type of emergencies occurring in any place.
