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Providing Alternatives to Color Coding to Convey Meaning

This section explains how to design applications to help satisfy the following Section 508 standards:

Do not use color as your only way to convey information. Include a redundant clue so that users who are blind or color-blind are aware that a field or process is special or different. For example, do not change the background or text color to red to indicate an error. Another common mistake is to use an icon that changes color based on status but is otherwise the same. Color-blind users cannot distinguish between certain colors, nor can screen readers. In addition, if a user prints a page on a black and white printer, color-dependent items on the page become indistinguishable.

When showing status, you have two options:

Note: In addition, do not use flickering, moving, blinking, scrolling, or auto-updating objects to indicate status.