If the user can adjust color and contrast settings, provide a range of color selections capable of producing a variety of contrast levels.
Rationale
Some users are sensitive to bright colors on a screen and need to be able to select a softer background color to clearly distinguish characters on the screen. Some users need more contrast between the foreground and background colors to be able to read the screen. When the user has the ability to adjust the color and contrast settings, the range of colors should be broad enough to allow a variety of contrast levels.
Development techniques
The following techniques are the minimum required to meet Checkpoint 3.2 from the IBM Hardware Self Contained, Closed Products Accessibility Checklist:
- Provide a variety of color choices so users can select an option which provides good contrast between the foreground and background color. Lighthouse International provides guidelines for making text legible (link resides outside of ibm.com) on their Web site at http://www.lighthouse.org/print_leg.htm. They also have guidelines for effective color contrast (link resides outside of ibm.com) at http://www.lighthouse.org/color_contrast.htm.
Testing techniques
Test the hardware to ensure that it complies with accessibility requirements.
Tools
No tools are needed to test this checkpoint:
Techniques
| Action | Result |
|---|---|
|
1. If the product permits a user to adjust color or contrast settings. Verify that a range of selections of colors is available producing a variety of contrast levels. Inspect.
|
Pass:
Fail:
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©2001, 2008 IBM Corporation
Last updated February 01, 2008.