Adjust contrast

The contrast settings of some websites may be difficult to see for people with low vision or may cause eyestrain. This feature allows the user to choose preferred contrast settings.

Related RtF projects and Discussion Groups

• Blindness and Low Vision Discussion Group (BLVDG)

Discussion by Disabilities (Benefits & Preferred Behaviors)

Blind & Low Vision

• Adjustable contrast settings allow people with low vision to personalize contrast settings so that colors are distinct and easy to see.

Existing Products

Please note that these products are not necessarily endorsed by RtF, but represent the range of available options.

Open Source and free

These products are free and their source code may be modified with few restrictions.

• AccessiBar Extension - Mozdev, Edan Kemelman
• Amaya - W3C
• CLC Star - CLC (Charles Chen)
• Web Access Gateway - U.of Cambridge, Silas Brown

Free, not necessarily open source

These products are free to use, but may have strict restrictions on viewing and modifying source code.

• JISC TechDis User Preference Toolbar - TechDis, Key2Access
• Surf Right Toolbar - Royal National Institute of Blind People (RNIB)
• Web Accessibility Toolbar - Web Accessibility Tools Consortium
• Web Adaptation Technology - IBM

Commercial, with free trial

These products are free to try for a limited period of time or with limited functionality. They must be purchased for full functionality.

• Screen Tinter - Thomson Software Solutions

Commercial, no free trial

These products must be purchased to be used, and did not offer free trials at the time of posting.

• ReadAble - Iansyst Ltd
• WebAdapt2Me - IBM