Use this calculator to determine the contrast between two colors that normally constitute the graphic
image and the background of a sign. The light reflectancy values (LRV) of APCO's colors have been measured using Tristimulus Y
value under D65 illuminant.
The ADA Accessibility Guidelines recommend at least 70 percent contrast between characters and their backgrounds.
See our LRV Chart
for more details on these values used in this calculator.
APCO Graphics, Inc.