Accessibility Statement: If you use color

1. Don't rely on color alone to convey information. Ensure that all information conveyed with color also is available without color, for example, from context or markup.
    

2. Use numbers, not names, for colors.
    

3. Test whether your page still works without color by viewing it using a monochrome monitor or with browser colors turned off. Try setting up a color scheme in your browser that only uses black, white, and the four browser-safe greys and see how well the page functions. In addition, view you page using multiple browsers and platforms, then verify it with tools like CAST's on-line BOBBY verification tool.

Read the relevant W3C guideline --  2.1
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