Color Contrast Checker
Check foreground and background colors against WCAG contrast thresholds. Free, private, and local-first.
Use Color Contrast Checker
Check foreground and background colors against WCAG contrast thresholds.
Readable preview text
Use this preview to check how body copy and headings feel together.
Ratio
17.85:1
AA normal
Pass
AAA normal
Pass
AA large
Pass
Contrast ratio: 17.85:1 Normal text AA: Pass Normal text AAA: Pass Large text AA: Pass Large text AAA: Pass
Quick answer
Color Contrast Checker is a free online tool that helps you check foreground and background colors against WCAG contrast thresholds. It runs in your browser, so you can work with development data, text, files, or generated output without creating an account.
About Color Contrast Checker
Color Contrast Checker helps you check foreground and background colors against WCAG contrast thresholds. It is designed for focused local-first workflows where you need a quick result without creating an account or sending your input to a server.
Common uses include checking button text readability, auditing landing page color pairs, reviewing design tokens for accessibility.
Use the examples, usage notes, FAQ, and related tools below when you need to compare formats, build sample data, validate inputs, or move into the next step of the same workflow.
What this tool does
How to use Color Contrast Checker
- 1
Enter the foreground color.
- 2
Enter the background color.
- 3
Review the live preview and contrast ratio.
- 4
Use the pass/fail report to adjust your palette.
Examples
Dark on white
#0F172A on #FFFFFF
Button text
White text on brand blue
Muted copy
Check secondary text before launch
Use cases
- Checking button text readability
- Auditing landing page color pairs
- Reviewing design tokens for accessibility
- Testing dark mode color combinations
- Preparing accessibility QA notes
Related workflow
After using Color Contrast Checker, many workflows continue with related tools for validation, conversion, cleanup, mock data, or final export.
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.
What does this color contrast checker do?+
Color Contrast Checker helps you check foreground and background colors against wcag contrast thresholds directly in your browser.
Can I copy the generated CSS?+
Yes. Generated color values and CSS snippets are shown in a copyable output area.
What should I double-check before using the output?+
The report follows common WCAG contrast thresholds. You should still review typography, font weight, size, and real UI context.