Template:Ensure AA contrast ratio
Revision as of 02:54, 29 August 2015 by imported>Rich Farmbrough (←Created page with '<includeonly>{{#if:{{{base|}}}|{{#ifexpr:{{#invoke:Color contrast|ratio|{{{base}}}|{{{other|}}}|error=21}} < 4.5 OR {{#invoke:Color contrast|ratio|{{{base}}}|bla...')
This template checks for compliance with WCAG G17, i.e. that a background–foreground colour combination has got a contrast ratio of more than 4.5:1. 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}}.
Note:
Examples
{{Ensure AA contrast ratio|base=navy|category=Test}}→{{Ensure AA contrast ratio|other=|base=navy|category=Test}}→{{Ensure AA contrast ratio|other=navy|base=navy|category=Test}}→ Test{{Ensure AA contrast ratio|base=red|category=Test}}→{{Ensure AA contrast ratio|base=#CC5500|category=Test}}→{{Ensure AA contrast ratio|base=asdf|category=Test}}→ Test
| The above documentation is transcluded from Template:Ensure AA contrast ratio/doc. (edit | history) Editors can experiment in this template's sandbox (create | mirror) and testcases (create) pages. Subpages of this template. |