Template:Ensure AA contrast ratio

From blackwiki
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...')
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Template documentation

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