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Color Contrast Matrix

Color

Generate a contrast matrix for multiple colors to check WCAG AA and AAA compliance.

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Color Contrast Matrix

#000000
#ffffff
#ff0000
#00ff00
#0000ff
#ffff00
#ff00ff
#00ffff
#000000
-
21.0
5.3
15.3
2.4
19.6
6.7
16.7
#ffffff
21.0
-
4.0
1.4
8.6
1.1
3.1
1.3
#ff0000
5.3
4.0
-
2.9
2.1
3.7
1.3
3.2
#00ff00
15.3
1.4
2.9
-
6.3
1.3
2.3
1.1
#0000ff
2.4
8.6
2.1
6.3
-
8.0
2.7
6.9
#ffff00
19.6
1.1
3.7
1.3
8.0
-
2.9
1.2
#ff00ff
6.7
3.1
1.3
2.3
2.7
2.9
-
2.5
#00ffff
16.7
1.3
3.2
1.1
6.9
1.2
2.5
-
AAA (7:1+)
AA (4.5:1+)
AA Large (3:1+)
Fail (<3:1)
More about the Color Contrast Matrix

Checking one color pair at a time works fine for a single decision, but a full brand palette, six or eight colors mixed and matched across a design system, has every possible pair worth knowing about in advance, which text colors are actually safe on which backgrounds, before a single component gets built using a combination nobody checked. This tool generates a full contrast matrix for a set of colors, checking every color against every other in the set at once and marking which pairings pass WCAG AA or AAA, rather than testing pairs one at a time as they come up. Useful for planning a color system where every safe text-and-background combination is known upfront, auditing an entire brand palette's usable pairings in one pass, or catching a pair that looks fine together visually but actually fails contrast requirements before it ends up in a live component.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

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Quick answers for Color Contrast Matrix

What does the Color Contrast Matrix do?
Generate a contrast matrix for multiple colors to check WCAG AA and AAA compliance. The Color Contrast Matrix is one of 900+ free developer tools on Toolblip - all open to use without a signup.
How do I use the Color Contrast Matrix?
Open the Color Contrast Matrix on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.
Is the Color Contrast Matrix free to use?
Yes. The Color Contrast Matrix is a free online tool on Toolblip - no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.
Is the Color Contrast Matrix safe and private?
Yes. The Color Contrast Matrix processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.
What kind of output does the Color Contrast Matrix produce?
The Color Contrast Matrix produces clean, formatted output that you can copy or download with a single click. The output is tailored to the tool's purpose — formatted code, converted data, transformed text, or processed media — and is ready for immediate use in your project or workflow.
Does the Color Contrast Matrix work on mobile devices?
Yes. The Color Contrast Matrix is designed to work on any device with a modern browser, including phones and tablets. The interface adapts to smaller screens, and the core functionality — paste input, transform, copy output — works the same way regardless of your device.
What color formats does the Color Contrast Matrix support?
The Color Contrast Matrix works with the formats web developers reach for every day - HEX, RGB / RGBA, and HSL. You can copy any value with one click for use in CSS, design tools, or code.
Can I pick a colour visually with the Color Contrast Matrix, or do I need to type values?
The Color Contrast Matrix supports both approaches. You can type colour values directly in any format (HEX, RGB, HSL), or click the colour swatch to open your system's native colour picker for visual selection. The tool converts between formats regardless of which input method you use.
Can I use the Color Contrast Matrix offline?
Once the page has loaded, the Color Contrast Matrix continues to work without an internet connection. Bookmark this page and return to it anytime - all logic runs locally.