Is Color Contrast Checker free to use?

Yes, Color Contrast Checker is completely free. No registration, no account, and no hidden costs — ever.

Is my data safe when using Color Contrast Checker?

All processing happens directly in your browser. Your data never leaves your device — nothing is uploaded or stored on our servers.

No. All CheckTown tools work instantly without registration or sign-up.

Color Contrast Checker works on any device — desktop, tablet, or phone. The interface adapts to your screen size.

对照 WCAG 2.1 无障碍标准，检查前景色与背景色之间的对比度。

前景色

背景色

Ctrl+Enter 运行Ctrl+Shift+C 复制

了解 WCAG 对比度的原理、AA 与 AAA 级别的区别，以及设计无障碍配色的技巧。

什么是色彩对比度，它为何重要

色彩对比度是指两种颜色之间的亮度差异，通常是前景文字与其背景之间的差异。充足的对比度能确保文字对每个人都清晰可读，包括低视力或色盲人士。对比度不足会让内容难以阅读甚至无法阅读，将数以百万计的用户拒之门外。