Check the contrast ratio between text and background colors and see if it passes WCAG AA and AAA for normal and large text.
Pick or type the text and background colors. The ratio and pass/fail results update instantly.
AA needs 4.5:1 for normal text and 3:1 for large text. AAA needs 7:1 and 4.5:1.
Low contrast text is hard to read for many people, especially in sunlight or on small screens.
About 24px regular or 18.7px bold and above.
The WCAG relative luminance formula.
Count characters with and without spaces.
Compare two texts and highlight the differences.
Validate email address format quickly and reliably.
Check how strong your password is and get tips.
Pick colors and convert between HEX, RGB and HSL.
Check if any website is up or down right now.