Colors on the Web Contrast Checker
Colors on the Web Contrast Checker: A free web checker for evaluating individual text, graphics, and UI color combinations. Ranked #7 of 23 in Color Contrast Checker Software by our editors (7.8/10); pricing: Free plan; best for people checking individual color combinations.
At a glance
- Editor score7.8 / 10
- PricingFree plan
- Best forPeople checking individual color combinations
- Free planYes
- Paid fromNone
- WCAG standards2.2
- Founded1998
- Facts checked4 Oct 2026
Where it wins
- Checks text, UI, and graphics against WCAG 2.1 and 2.2 AA and AAA requirements
- Suggests calculated color adjustments and AI-powered alternatives
- Includes text previews, color-vision simulation, and shareable links
Where it doesn't
- Evaluates one foreground/background combination at a time
- Does not determine whether an entire website conforms to WCAG
- Available as a web tool rather than a desktop or mobile app
Our verdict on Colors on the Web Contrast Checker
Colors on the Web Contrast Checker is a free browser-based tool for people who need to assess individual foreground and background color combinations. It checks text, UI components, and graphics against WCAG 2.1 and 2.2 AA and AAA requirements, then displays contrast ratios and pass/fail results for normal and large text. This makes it relevant to designers, developers, and other users reviewing color choices, especially where a quick check of a specific pairing is the goal.
The checker goes beyond reporting a ratio: when a combination fails, it provides calculated color adjustments, and it also offers AI-powered color suggestions. Users can preview text at multiple sizes and weights, inspect foreground and background values in hex, RGB, and HSL, and simulate color blindness. A shareable link makes it possible to pass along a particular combination for review. These features support focused comparison and refinement, but the checker remains centered on color pairings rather than broader accessibility evaluation.
The published Free plan covers contrast checks for individual color combinations, and the product is available on the web. Its one-combination-at-a-time scope is important: it does not determine whether an entire website conforms to WCAG. Choose it when you want a free way to evaluate and adjust particular colors, including text and non-text uses. If your priority is assessing a whole site rather than reviewing individual combinations, this tool is not designed to provide that site-wide determination.
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Colors on the Web Contrast Checker pricing
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Colors on the Web Contrast Checker fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| WCAG standards | 2.2 |
| Contrast modes | Text, graphics and UI |
| Contrast suggestions | Yes |
| Design integrations | Not verified |
| Platforms | web |
| Batch color-pair checks | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan (source) |
| Website | colorsontheweb.com |
| Facts checked | 4 Oct 2026 |
Alternatives to Colors on the Web Contrast Checker
- WebAIM Contrast CheckerA free web checker for text and UI contrast, with a basic API and bookmarklet.9.1
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker)A free web checker for reviewing color pairs against WCAG contrast thresholds.9.0
- Silktide Color Contrast CheckerA free Chrome extension for checking page text and interface contrast against WCAG.8.7
See all Colors on the Web Contrast Checker alternatives →
Colors on the Web Contrast Checker vs the competition
- Colors on the Web Contrast Checker vs WebAIM Contrast Checker
- Colors on the Web Contrast Checker vs Acquia Color Contrast Checker (formerly Monsido Contrast Checker)
- Colors on the Web Contrast Checker vs Silktide Color Contrast Checker
- Colors on the Web Contrast Checker vs Colour Contrast Analyser (CCA)
- Colors on the Web Contrast Checker vs Figma
- Colors on the Web Contrast Checker vs Color Contrast
Compare Colors on the Web Contrast Checker with any tool side by side →
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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Colors on the Web Contrast Checker for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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