Image & Design Tools
Contrast Checker
Check foreground and background contrast against AA and AAA thresholds.
Input / output
Aa Sample
Text contrast preview
WCAG result
21:1
Recommended color: #000000
Normal text AA
>= 4.5:1
Pass
Normal text AAA
>= 7:1
Pass
Large text AA
>= 3:1
Pass
Large text AAA
>= 4.5:1
Pass
UI component / non-text 3:1
>= 3:1
Pass
CSS code
.sample {
color: #000000;
background: #FFFFFF;
}HelpOpen usage notes, examples, practical tips, and FAQ only when you need them.
What is this tool?
Contrast Checker is a browser-first tool for check foreground and background contrast against AA and AAA thresholds. It fits into the image and design workflow and keeps the main task on one page.
How to use it
- Enter the input
Paste or edit the value in the input area. Sample values are safe placeholders for testing the tool.
- Adjust options
Choose the mode, format, unit, or count that matches the contrast, WCAG, accessibility task.
- Review the result
Run the tool, inspect the output, then copy or download it only when the result matches your expectation.
Examples
Contrast Checker example
- Input
- Sample input
- Output
- Review the result in the browser.
Practical tips
- For large inputs, process the smallest useful sample first to keep the browser responsive.
- Ad slots are intentionally kept away from tool controls and result panes.
FAQ
What input should I use with Contrast Checker?
Use values that match the contrast, WCAG task, then adjust the visible options before running the tool.
Can I copy the Contrast Checker result?
Yes. Review the output first, then copy or download it when the result matches your expectation.
Can I use Contrast Checker on mobile?
Yes. The input, options, action, and result areas are designed to stack cleanly on small screens.
Will ads interrupt Contrast Checker?
No. Ad slots stay outside the input, output, and primary action areas so the tool remains usable and policy-safe.