Hardware Self Contained, Closed Products

Checkpoint 3.2: Contrast

If the user can adjust color and contrast settings, provide a range of color selections capable of producing a variety of contrast levels.


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.

Required development techniques

The following techniques are the minimum required to meet Checkpoint 3.2 from the IBM Hardware Self Contained, Closed Products Accessibility Checklist:

Recommended development techniques

The technique above is required; the following techniques are recommended to enhance accessibility:

Required test techniques

Test the hardware to ensure that it complies with accessibility requirements.


No tools are needed to test this checkpoint:


One or more of the following techniques are required to verify this checkpoint:
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:


©2009 IBM Corporation

Last updated September 01, 2009.