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Color Contrast Matrix

Check WCAG contrast ratios for all color pairs at once.

About Color Contrast Matrix

Designing for the web often involves fine-tuning visual properties until they look just right. Color Contrast Matrix gives you an interactive playground to check wcag contrast ratios for all color pairs at once and instantly see the result. When you're happy with the output, copy the generated CSS code and paste it into your stylesheet — no guesswork needed.

How to Use

Adjust the visual controls Use sliders, color pickers, and dropdowns to customize the design properties. The preview updates in real time.

Fine-tune the result Experiment with different values until the design looks exactly the way you want it.

Copy the CSS code Click the Copy button to copy the generated CSS code. It's production-ready and includes vendor prefixes where needed.

Paste into your project Add the copied CSS to your stylesheet. The code works in all modern browsers without modification.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Color Contrast Matrix?

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Visual Live Preview See your changes in real time as you adjust values. No more guessing what CSS properties will look like — experiment visually and copy the code.

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Production-Ready CSS The generated code is clean, optimized, and ready to paste directly into your stylesheet. Includes vendor prefixes where needed for cross-browser support.

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Faster Than Hand-Coding What takes 10 minutes of CSS trial-and-error takes 10 seconds with Color Contrast Matrix. Adjust sliders and dropdowns instead of editing numbers in code.

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Learn CSS Visually Perfect for CSS beginners who want to understand how properties affect visual output. Experiment with values and see the relationship between code and design.

Frequently Asked Questions

WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18px+ or 14px+ bold). Level AAA requires 7:1 for normal text and 4.5:1 for large text.

Each RGB channel is divided by 255, then gamma-corrected using the sRGB formula: values ≤ 0.04045 use linear mapping, others use the power formula. The luminance L = 0.2126R + 0.7152G + 0.0722B.

Green cells pass both AA and AAA. Yellow cells pass AA only (ratio 4.5–7). Red cells fail WCAG AA. Click any cell to see a live preview of that color combination.