Design Tools
Contrast Checker
Check color contrast online for text and background colors, including WCAG AA and AAA pass/fail guidance, directly in your browser.
Preview the foreground/background pair and copy the contrast summary for QA notes.
Contrast ratio 14.68:1. WCAG AA normal text: pass. AA large text: pass. AAA normal text: pass.
Check color contrast online
This accessibility contrast checker compares a foreground text color with a background color and returns the WCAG contrast ratio. It shows whether the pair passes AA and AAA thresholds for normal text and large text, so designers and developers can catch low-contrast UI copy before publishing.
WCAG AA generally needs 4.5:1 for normal text and 3:1 for large text. AAA generally needs 7:1 for normal text and 4.5:1 for large text. Use the preview to test body copy, buttons, links, badges, alerts, and design-token pairs from CSS or Figma handoffs.
Your colors stay in your browser. ClearUtils does not upload, store, fetch, or log the HEX values you enter, and the result is a practical accessibility QA check rather than a full design-system audit.
Accessible color workflow tips
Start with the exact foreground and background pair users will see. A single brand color can pass on white but fail on tinted cards, disabled buttons, or dark-mode surfaces.
Convert design tokens
Use HEX to RGB or HEX to HSL when a CSS variable needs another color format before checking contrast.
Build safer palettes
Use Color Shades Generator to create tints and shades, then bring important text/background pairs back here for WCAG review.
Audit copied CSS colors
Use Extract HEX Colors when a stylesheet or design note has many colors and you need candidate pairs to test.
Important limitation: contrast ratio is only one accessibility signal. Font size, weight, state changes, focus indication, disabled styling, images behind text, and real user testing still matter.
Quick answer
Contrast Checker is a browser-based contrast checker for completing this utility task locally and moving to related tools only when they fit the same workflow.
- Primary task
- contrast checker
- Processing
- Pasted text is processed in your browser and not stored by ClearUtils.
- Workflow
- Color Tools Toolkit
What this tool does
Compare two HEX colors, calculate their contrast ratio, preview the pair, and show WCAG AA/AAA results for normal and large text without uploading or storing anything.
Common use cases
Check foreground and background color contrast for accessibility QA, design handoffs, CSS changes, and visual reviews before publishing.
Use Contrast Checker for a focused browser-local utility task, then continue with related tools only when the next step is part of the same workflow.
How to use it
- Enter a foreground text color and background color in HEX format.
- Review the contrast ratio and WCAG AA/AAA pass or fail results.
- Preview the color pair, adjust either color, and copy the summary for accessibility QA notes.
Example workflow
Enter the values or content for the task, review the result, then use related tools only when they match the next step of the same workflow.
Privacy note
Client-side only: contrast checking runs locally in your browser. Color values are not uploaded, stored, fetched, or logged.
Practical notes for this tool
Best use case
Use Contrast Checker when a design handoff, CSS token change, brand palette, dark-mode surface, or component QA note needs a quick foreground/background WCAG contrast check before publishing.
Check a button color pair
Text color: #FFFFFF Button background: #2563EB
Contrast ratio 5.17:1 WCAG AA normal text: pass WCAG AAA normal text: fail WCAG AAA large text: pass
Privacy and local processing
Contrast checking runs locally in your browser. ClearUtils does not upload, store, fetch, or log HEX colors, design-token values, stylesheet snippets, or accessibility QA notes you type into the page.
Limitations to know
- It checks two flat colors at a time and does not inspect live pages, screenshots, gradients, transparency, or images behind text.
- WCAG pass/fail thresholds depend on whether text is normal or large; confirm typography in the real UI.
- A passing color pair does not validate keyboard access, focus indication, labels, or other accessibility requirements.
Practical FAQ
Does a passing contrast ratio guarantee the whole UI is accessible?
No. Contrast ratio is one accessibility check. Font size, weight, focus states, disabled states, text over images, motion, keyboard access, labels, and user testing still need review.
Related workflow links
FAQ
These answers focus on the current utility task, safe input handling, result review, and choosing related tools only when they fit the same workflow.
3 focused answers for this page
Does this contrast checker upload my colors?
No. Color contrast checking runs locally in your browser and does not upload, store, fetch, or log entered color values.
What contrast ratio passes WCAG AA?
WCAG AA generally requires 4.5:1 for normal text and 3:1 for large text. AAA requires 7:1 for normal text and 4.5:1 for large text.
Can I use short HEX colors?
Yes. The checker accepts 3-digit and 6-digit HEX colors such as #fff, #000000, or #2563EB.