A practical guide to ANSI Z535 colors, signal words, and how to order custom safety decals that hold up on the job.
Quick answer: ANSI safety decals use four color-coded signal words defined by the
ANSI Z535 standard: red for DANGER (immediate, life-threatening hazards), orange for WARNING (potential death or serious injury), yellow for CAUTION (minor to moderate injury risk), and blue for NOTICE (property damage or non-injury information). Green is used separately for general safety information like exits and first aid stations.
Every warehouse, job site, and piece of industrial equipment needs safety labeling that people can read and understand in a split second. ANSI safety decals use a standardized system of colors and signal words so a worker in Ohio and a worker in Oregon interpret a red DANGER decal the same way. This guide breaks down what the ANSI Z535 standard actually requires, how ANSI compares to OSHA and ISO labeling, what materials hold up best in the field, and what to look for when you order custom industrial safety decals, warning decals, or danger decals for your facility or equipment.
This article is provided for general reference on ANSI Z535 formatting conventions. It is not a substitute for a compliance or legal review of your specific labeling requirements.