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| {{#switch:1 | | <includeonly>{{#if:{{{base|}}}|{{#ifexpr:{{#invoke:Color contrast|ratio|{{{base}}}|{{{other|}}}|error=21}} < 7 OR {{#invoke:Color contrast|ratio|{{{base}}}|black|error=0}} < 7 AND {{#invoke:Color contrast|ratio|{{{base}}}|white|error=0}} < 7|{{{category|}}}}}}}</includeonly><noinclude> |
| | {{#ifexpr:{{#invoke:Color contrast|ratio|{{{1}}}|black}} > 7|1}}
| | {{Documentation}}</noinclude> |
| | {{#ifexpr:{{#invoke:Color contrast|ratio|{{{1}}}|white}} > 7|1}} = background-color: {{{1}}}; color: {{#invoke:Color contrast|greatercontrast|{{{1}}}|black|white}}; | |
| | #default = {{{cat|}}}}}<noinclude>
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| {{Documentation|content= | |
| This template ensures compliance with [http://www.w3.org/TR/2014/NOTE-WCAG20-TECHS-20140916/G17 WCAG G17]. It will reject any background–foreground colour combination with a contrast ratio less than 7:1. {{tl|Ensure AAA contrast ratio}} takes one argument, the background colour.
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| Here is {{diff|Template:Infobox television season|prev|672035442|an example of how to use it}}.
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| == Examples ==
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|navy}}
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|red}}
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|white}}
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|black}}
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|#005500}}
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| * {{#invoke:DemoTemplate|{{PAGENAME}}|#CC5500}}
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| }} | |
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| [[Category:Color conversion templates]]
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| </noinclude> | |
