Template:Ensure AAA contrast ratio/doc
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 | This is a documentation subpage for Template:Ensure AAA contrast ratio. It contains usage information, categories and other content that is not part of the original template page. |
 | This template is used on approximately 17,000 pages, so changes to it will be widely noticed. Please test any changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Please consider discussing changes on the talk page before implementing them. |
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This template checks for compliance with WCAG G17, i.e. that a background–foreground colour combination has got a contrast ratio of more than 7:1. It takes two arguments, the base colour value, and the tracking category, category, to place non-compliant transclusions in. A third parameter, other, is optional; the template will by default calculate the contrast ratio against black and white, on the assumption that it is used in conjunction with {{Greater color contrast ratio}}.
Examples
{{Ensure AAA contrast ratio|base=navy|category=Test}}→{{Ensure AAA contrast ratio|other=|base=navy|category=Test}}→{{Ensure AAA contrast ratio|other=navy|base=navy|category=Test}}→ Test{{Ensure AAA contrast ratio|base=red|category=Test}}→ Test{{Ensure AAA contrast ratio|base=#CC5500|category=Test}}→ Test{{Ensure AAA contrast ratio|base=asdf|category=Test}}→ Test
See also
- {{Ensure AA contrast ratio}}
- {{Greater color contrast ratio}}
- Template:Color contrast conformance § HTML colors
- Wikipedia:Manual of Style/Accessibility § Color
