What is a key requirement for elevator emergency signage?

A key requirement for elevator emergency signage is that it must be in contrasting colors. This ensures high visibility and readability in various lighting conditions, which is essential for safety during emergencies. Contrasting colors help individuals quickly identify safety information and instructions, especially in stressful situations or when panic may hinder clear thinking.

While other aspects of signage are certainly important—like illumination for visibility in dark spaces, the inclusion of braille for accessibility, and appropriate placement at eye level to ensure easy viewing—none of these elements addresses the fundamental need for signage to be clear and easily perceivable in an urgent context as effectively as contrasting colors do.