FreeConvert
Color Tools

Free Color Tools

Color Contrast Checker

Check color contrast online free with WCAG ratio results for text and background colors. Test AA and AAA accessibility levels.

Client-side

Contrast result

Readable text preview

Use this preview to check body text, button labels and headings before publishing your design.

Contrast ratio

17.74:1

Normal text AA

Pass

Large text AA

Pass

Normal text AAA

Pass

Large text AAA

Pass

Foreground: #111827
Background: #ffffff
Contrast ratio: 17.74:1
Normal text AA: Pass
Large text AA: Pass
Normal text AAA: Pass
Large text AAA: Pass

Color Tools

About Color Contrast Checker

Check color contrast online free with WCAG ratio results for text and background colors. Test AA and AAA accessibility levels. The work happens in your browser, so your input stays on your device while you prepare the result.

Checking whether text colors are readable on buttons, cards and page backgrounds.

Improving accessibility before publishing a UI or graphic.

How to use Color Contrast Checker

  1. 1Open Color Contrast Checker and enter the values or text needed for the task.
  2. 2Adjust the available options and review the result in the preview area.
  3. 3Copy or download the result without creating an account.

Practical notes

  • WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text.
  • Do not rely on color alone for important interface states.

Related tools

Color Picker

When to use Color Contrast Checker

Use Color Contrast Checker when you need checking whether text colors are readable on buttons, cards and page backgrounds. Check color contrast online free with WCAG ratio results for text and background colors. Test AA and AAA accessibility levels. The page is designed as a direct work surface, so you can reach the tool, understand the inputs and finish the task without creating an account.

Before entering data, check the exact result you need and whether the output will be copied, downloaded, printed or submitted elsewhere. The most useful controls for this tool are Foreground and background pickers, WCAG contrast ratio and AA and AAA checks, which helps you avoid repeating the same work in another app.

This tool is also useful for improving accessibility before publishing a ui or graphic. Because the work runs in the browser, it is a good fit for routine checks, drafts and small private inputs that do not need a cloud account or shared workspace.

After creating the result, review the visible output before using it in a payment flow, document, design, message, code snippet or calculation. Small mistakes in copied text, numbers, colors, units or encoded data can create larger problems after the result is shared.

Common mistakes to avoid

  • Using Color Contrast Checker without checking the destination requirement first.
  • Copying the first result without reviewing spelling, numbers, units or formatting.
  • WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text.
  • Clearing the page before saving or copying the final result.

Practical tips

  • WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text.
  • Do not rely on color alone for important interface states.
  • Keep source values nearby when the result will be used in a form or document.
  • Use related tools from the same category when the task has another preparation step.

Related guides

Why Browser-Based File Tools Are Useful for Private Documents

Common questions

Does this tool upload my data?

No. The tool runs in your browser and keeps the selected content on your device.

Is this tool free?

Yes. It is free to use in the browser and does not require an account.