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Designing Accessible Web Pages

Keep backgrounds simple. Make sure there is enough contrast by using easy-to-read fonts in dark shades of blue, purple, or black.
 

People with low vision or colorblindness, or those using black and white monitors can have difficulty reading information at sites with busy backgrounds and dark colors. Some background images obscure text and make reading difficult. Simple easy to read fonts in dark shades of blue, purple, or black are easiest to read on unpatterned backgrounds. Make sure there is enough contrast between your text and the background of the page.

Choose background, text, and link colors carefully and always test your site by viewing it a different resolutions and color depths. For example, you can change your monitor settings to a resolution of 640x480 and 16 colors for one test and to 1024x768 and 24 bit color for another.

 

Easy to read black text on pale yellow background Hard to read black text on busy background
Hard to read text on busy background Hard to read green text on purple background

Example of Color Contrast