对比度检查

使用方法

1. 输入
2. 输入
3. Read the contrast ratio and the WCAG 2.1 pass/fail badges for normal text (AA requires 4.5:1), large text (AA requires 3:1), and UI components (3:1).
4. 上传并选择

示例

• Foreground #767676 on background #ffffff produces a ratio of 4.48:1, which fails AA for normal text but passes for large text.
• Foreground #000000 on #ffffff gives 21:1, passing every WCAG 2.1 level including AAA.