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Color Contrast Tools

Accessibility Tip

Student shows his diverse color selection before adding his hand print to the Free Expression Tunnel during Respect The Pack.

Color contrast is an important aspect of accessible design, particularly for text and other important data. Color contrast means the difference in brightness between two colors, in this case the text and the background. Contrast is described using a ratio, ranging from 1:1 (white on white) to 21:1 (black on white). For accessibility purposes, 4.5:1 is the minimum ratio that allows people with moderately low vision to tell the colors apart and see your content. 

Color contrast checkers make it easy to determine the ratio for your colors: