Requirement • Explanation
Section 508 Requirement
(c) Color Usage & Contrast:
Web pages shall be designed so that all information conveyed with color is also available without color, for example from context or markup.
Carefully consider color choices. Be sure to choose high contrast colors for page backgrounds and text and never use color as the only means to share information with your visitors. Be sure to design Web pages so that all information conveyed with color can be understood without color.
An excellent example of conveying information both with and without color on the Winthrop Web site can be found on the Records and Registration undergraduate commencement page. This department effectively uses colors AND numbers to explain the seating arrangement in the coliseum.
Note that approximately "8% of males and 0.5% of females have some degree of color-vision deficiency" (Visolve). There are three prevalent types of color blindness:
- Deutanopia (red/green color blindness with no green cones)
- Protanopia (red/green color blindness with no red cones)
- Tritanopia (blue/yellow color blindness with no blue cones)
For more information about color deficiencies, visit "Colors for the Color Blind."
To test Web pages using an online color vision simulator, visit Vischeck.
For your convenience, you may also wish to download a printer-friendly Section 508 checklist (pdf).
For additional assistance with this requirement, send an email to firstname.lastname@example.org.