In the United States, exit sign color is not uniform across all jurisdictions. The required color is determined by the authority having jurisdiction (AHJ) and the adopted versions of national and local fire and life-safety codes. Generally, exit signs must be clearly visible, illuminated, and with high contrast to guide people to safety. While many buildings use green signs with white lettering, some older codes or specific facilities may require red signs or have other color requirements. This article explains the common color standards, governing codes, and practical considerations for compliance.
Approved Colors For Exit Signs In The United States
The most common color schemes for exit signs in U.S. buildings are green signs with white lettering or white signs with red lettering. The shift toward green signs has been driven by model codes and new editions of life-safety codes, which favor green as the color for exit indicators and white for the text or pictograms. However, red exit signs are still permitted where the jurisdiction has not migrated to green or where the existing code language specifies red. Building owners should not assume a universal color; they should verify with the AHJ and applicable codes for their facility.
- Green Exit Signs with White Lettering/Pictograms: Widely adopted under modern editions of NFPA 101 Life Safety Code and the International Building Code (IBC). Green is associated with a safe egress path and is typically illuminated.
- Red Exit Signs with White Lettering: Still found in older buildings or jurisdictions that have not updated to green signage. Must be illuminated and meet contrast requirements.
- Photoluminescent or Self-Illancing Signs: In some cases, non-electrical signs that glow in the dark are approved as part of the egress system when combined with required lighting and maintenance standards.
What Codes Govern Exit Sign Color
Exit sign color is driven by national model codes, state and local amendments, and the AHJ. Key references include:
- NFPA 101 Life Safety Code: Sets standards for egress, including sign visibility and illumination. Modern editions favor green exit signs with white lettering and pictograms, though red signs may still be allowed in certain installations or jurisdictions.
- International Building Code (IBC): Aligns with NFPA 101 on egress signage color in most jurisdictions that adopt IBC language. Green signs are commonly required when the code follows NFPA 101 color recommendations.
- Occupational Safety and Health Administration (OSHA): Ensures signage is visible and legible for workers, often harmonizing with NFPA and IBC color schemes, but enforcement can vary by state and locality.
- State and Local Amendments: Some states maintain older color schemes or allow red signs under specific conditions. The AHJ determines whether to accept green, red, or other compliant configurations.
Illumination And Visibility Requirements
Regardless of color, exit signs must meet illumination and visibility criteria to be effective in emergencies.
- Illuminated Signs: Exit signs must be provided with a reliable light source. Electric-powered signs should have a constant power supply, with battery backup or emergency power available for outages.
- Photoluminescent Signs: In some facilities, signs that glow due to photoluminescent material are allowed if the building is equipped with adequate emergency lighting to render the signs visible during a power outage.
- Contrast And Legibility: The sign color must contrast with the surrounding environment to ensure legibility from a distance. This is a common requirement across green-on-white or white-on-green configurations.
- Placement And Height: Exit signs should be placed over doors or along egress routes, visible from multiple approach angles, and comply with mounting height and thickness standards set by code.
Practical Guidance For Building Owners And Managers
To stay compliant and ensure occupant safety, consider the following practical steps:
- Check Your AHJ Documentation: Confirm the adopted color scheme in the Authority Having Jurisdiction’s current code supplements and amendments.
- Audit Existing Signage: Inspect all exit signs for illumination, legibility, and correct color. Replace red signs with green equivalents if the jurisdiction requires green.
- Verify Back-Up Power: Ensure emergency power sources are reliable so signs remain illuminated during outages.
- Maintain Clear Egress Paths: Signs should be installed above doors or along the path of egress with unobstructed visibility.
- Document and Plan For Updates: When code updates occur, prepare an implementation plan and timeline for replacing noncompliant signs and updating documentation.
In summary, while green exit signs with white text are increasingly common in modern U.S. buildings, red signs remain permissible in certain jurisdictions or older facilities. The decisive factor is the AHJ and the specific code editions adopted by the locality. Ensuring illumination, contrast, proper placement, and back-up power are critical components of effective exit signage, regardless of color.