Contrast Finder
A web tool that checks color contrast against WCAG and suggests close valid color pairs.
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About Contrast Finder
Contrast Finder computes the contrast ratio between a text color and a background color and checks it against a chosen minimum of 3, 4.5 or 7, following WCAG success criterion 1.4.3. Colors can be entered as hexadecimal, RGB or CSS keywords.
When a pair fails, you choose whether to edit the text or the background color, and the tool suggests either valid colors very close to the original or a wider range of valid colors. The source is published on GitHub with releases for running it yourself.
Strengths
- Suggests valid colors close to the original
- Choose to adjust text or background color
- Accepts hex, RGB and CSS color keywords
- Can be self-hosted
Limitations
- Checks one color pair at a time
- Focused only on contrast, not other accessibility criteria
Details
- Pricing
- FreeFree to use online and open source for self-hosting.
- License
- AGPL-3.0
- Developer
- Asqatasun
- Platforms
- Web, Self-hosted
- How it runs
- Web application, Self-hosted
- Account
- Not required
- Best suited for
- Web designers and accessibility auditors fixing failing color contrasts
- Categories
- Color tools, Website testing
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to Contrast Finder
Compare allSoftware that can replace Contrast Finder for an important use case, and what changes if you switch.
Accessible Colors
A web checker that tests text and background contrast against WCAG and suggests the closest passing colors.
Accessible Colors also suggests the nearest passing colors against AA and AAA, but is a closed web tool based on WCAG 2.0 rules with no self-hosting.
Accessible Color Generator
A web tool that finds the closest accessible variation of a brand color for a chosen background.
Accessible Color Generator suggests the closest accessible variation of a brand color, with separate large and small text results, and is not open source.
WebAIM Contrast Checker
An online checker that tests foreground and background color contrast against WCAG AA and AAA levels.
WebAIM Contrast Checker reports results for text and UI components with shareable permalinks, but you adjust colors manually instead of receiving suggestions.
Colour Contrast Analyser
A free desktop app for checking foreground and background color contrast against WCAG, with eyedropper pickers.
Colour Contrast Analyser is an open-source Windows and macOS desktop app with a screen-wide eyedropper and WCAG 2.0 to 2.2 results.
Colour Contrast Checker
A web tool that checks foreground and background colour pairs against WCAG contrast levels.
Colour Contrast Checker gives AA and AAA pass or fail results with RGB or HSL sliders and Google font previews, without self-hosting.
Contrast Ratio
A web tool that calculates the WCAG contrast ratio between a text color and a background color.
Contrast Ratio updates live as you type and handles semi-transparent colors, but offers no suggested fixes or self-hosting.
Colorable
A web tool for testing the contrast of a text and background color pair against WCAG levels.
Colorable shows contrast ratio and WCAG level with HSL sliders and random buttons, and is not open source.
Contrast Finder as an alternative
Listings that name Contrast Finder as an alternative.
RandomA11y
A web tool that generates random color pairs meeting WCAG contrast requirements.
Contrast Finder is open source under AGPL-3.0 and can be self-hosted, and it suggests valid colors close to a pair you enter instead of random ones.
Similar software
Related functionality, not necessarily a direct replacement.
WhoCanUse
A web tool showing how a text and background color pair looks to people with various vision conditions.
Toptal Colorblind Web Page Filter
A web tool that renders a web page through color blindness filters to test its design.
Leonardo
Adobe's web tool for generating accessible color themes and scales from target contrast ratios.
Coblis
A browser-based simulator that shows how an image looks to people with color vision deficiencies.
