Color Contrast Checker
Color Contrast Checker 是一款面向实际工作的网页工具，无需安装即可快速使用。大部分处理都在浏览器中完成，不会隐藏上传。
WCAG AA for normal text requires 4.5:1. AAA for normal text requires 7:1.
使用方法
输入 Color Contrast Checker 所需数据，调整选项并运行工具。复制或下载前请先检查结果。
示例
可用于内容准备、资源检查、片段验证和可重复的生产任务。 Validate foreground and background color pairs against WCAG AA and AAA thresholds.
比较
The live preview, ratio, and pass/fail cards make accessibility decisions visible at a glance. OneClickSite keeps input, settings, preview, and saving steps in one predictable workflow.
何时使用
Use it before shipping buttons, cards, labels, hero text, and dashboard status colors.
提示
请保留原始文件或文本，直到确认输出结果。
FAQ
What ratio should normal text pass?
WCAG AA normal text needs at least 4.5:1; AAA normal text needs at least 7:1.
我的数据会上传到服务器吗？
不会。该工具在浏览器中运行。
Can I use this for commercial work?
Yes. Review the output and keep your source files so you can compare results before publishing.
Does it work on mobile?
Yes. Inputs, controls, and result panels are designed for mobile and desktop use.