Georgia Tech Research Institute
 
Issues

Labeling: Issue 2 of 6

Issue: Raised or recessed lettering may be difficult to perceive.

Raised or recessed lettering is often the same color as the background, so the contrast between the lettering and the background is insufficient. The lack of contrast makes it difficult for users with low vision or low contrast sensitivity to distinguish the lettering from the background surface.

Populations Impacted: Users with low vision.

Potential Solution:
  • Ensure that raised or recessed lettering is different in color from the control panel surface. The contrast between the lettering and the background surface should be at least 3:1. If the device is to be used in very bright lighting or outdoors, then a contrast ratio of at least 10:1 may be more appropriate. Using sufficiently contrasting colors will help users with low vision or low contrast sensitivity perceive and read the lettering.

Applicable Guidelines:
Section 508 - 1194.31(b)
HFDS - 9.6.7
EITAAC - 5.2.1.2.1, 5.2.1.2.4