模板:Ensure AA contrast ratio/doc

使用方式

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: this is compliant with AAA for 18 point or 14 point bold text.

Contrast ratios

Rating	Normal text	18 point or 14 point bold text
AA	4.5	3
AAA	7	4.5

示例

• {{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

参见

• {{Ensure AAA contrast ratio}}
• {{Greater color contrast ratio}}
• Wikipedia:格式手册/无障碍 § 颜色