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ANSI safety colors
  • The current version of ANSI Z535.1 designates 10 safety colors but does not specify their meanings.
  • No comprehensive consensus standard for color meanings exists, so the 1998 version of Z535.1 is commonly used for guidance.

American National Standards Institute (ANSI) regulation Z535.1 is regularly revised about every five years. The latest edition focuses on color tolerances for 10 safety colors: red, orange, yellow, green, blue, black, white, purple, brown, and gray.

The 1998 edition of the consensus standard offered color meanings, which have since been removed from the standard. The idea was that other consensus standards for marking systems would cover the “application” or use of safety colors found in ANSI Z535.1.

Currently, there is no comprehensive regulation or consensus standard that lists the meanings of all safety colors, so employers continue to refer to the 1998 edition of ANSI Z535.1 for guidance. Below is a list of the safety colors and their meanings recommended by ANSI in 1998:

Safety colorMeaning
Safety Red
  • Fire protection equipment
  • Danger
  • Flammable liquid
  • Stop, including emergency stop buttons
Safety Orange
  • Warning
  • Machine parts that may cause injury
  • Exposed parts
Safety Yellow
  • Potential hazards
  • Caution against unsafe acts
  • Physical hazards (striking against, stumbling, falling, tripping, and getting caught in between)
  • Flammable materials storage
  • Corrosives
  • Instability
  • Traffic designation
  • Housekeeping mark
Safety Green
  • Safety equipment
  • First aid
  • Evacuation routes
Safety Blue
  • Safety information
  • Personal protective equipment (PPE)
  • Notice
Safety Black
  • Traffic designation
  • Housekeeping mark
Safety White
  • Traffic designation
  • Housekeeping mark
Safety Black and White combination
  • Traffic designation
  • Housekeeping mark
Safety Black and Yellow combination
  • Traffic designation
  • Housekeeping mark
Safety Purple
  • No assigned meanings or applications
Safety Brown
  • No assigned meanings or applications
Safety Gray
  • No assigned meanings or applications