Which color combinations are allowed for exit sign backgrounds and lettering?

Which color combinations are allowed for exit sign backgrounds and lettering?

• A. Red letters on white or green background, or white or green lettering on a red background
• B. Green letters on red background only
• C. Black letters on yellow background
• D. White letters on blue background

Answer: (A)

Exit signs must be highly legible in dim light and through smoke, so codes specify which color pairings are allowed. The permitted combinations include red lettering on a white or green background, or white or green lettering on a red background. These options maximize contrast in most environments and under emergency lighting, aiding quick recognition. Other color pairings like black on yellow or white lettering on blue are not designated for exit signs by these standards and would reduce legibility under stress.

Exit signs must be highly legible in dim light and through smoke, so codes specify which color pairings are allowed. The permitted combinations include red lettering on a white or green background, or white or green lettering on a red background. These options maximize contrast in most environments and under emergency lighting, aiding quick recognition. Other color pairings like black on yellow or white lettering on blue are not designated for exit signs by these standards and would reduce legibility under stress.