Acquia Color Contrast Checker (formerly Monsido Contrast Checker)
Acquia Color Contrast Checker (formerly Monsido Contrast Checker): A free web checker for reviewing color pairs against WCAG contrast thresholds. Ranked #2 of 23 in Color Contrast Checker Software by our editors (9.0/10); pricing: Free plan; best for buyers who want a simple, established web checker.
At a glance
- Editor score9.0 / 10
- PricingFree plan
- Best forBuyers who want a simple, established web checker
- Free planYes
- Paid fromNone
- WCAG standards2.2
- Facts checked4 Oct 2026
Where it wins
- Checks foreground/background contrast and shows ratio guidance against WCAG thresholds
- Accepts RGB and hexadecimal values, with an on-page color selector
- Lets you adjust color lightness while reviewing a color pair
Where it doesn't
- Checks text contrast only, rather than other contrast modes
- Does not suggest alternative colors that meet contrast guidance
- Does not support batch checking of color pairs
Our verdict on Acquia Color Contrast Checker (formerly Monsido Contrast Checker)
Acquia Color Contrast Checker is a free online tool for people designing website text and other content who need to assess foreground and background color contrast. It accepts RGB and hexadecimal values, or lets users choose colors with its color selector, then provides a contrast ratio and guidance against WCAG thresholds. The checker is available on the web as a standalone tool; it is distinct from Acquia Web Governance, a separately sold platform. Its scope suits an individual color-pair check more than a broader accessibility workflow.
The tool’s focused workflow is its main advantage: enter or select a foreground and background color, review the ratio and WCAG guidance, and adjust lightness as needed. That makes it useful during design decisions when a person wants to assess text contrast without adopting a larger toolset. The category specification identifies text as its contrast mode, with no batch color-pair checking or contrast suggestions. Designers looking for automated alternatives or repeated pair testing will likely need a different checker.
Acquia lists the checker among its free web optimization tools, and the product is presented as a free tool rather than a paid tier of Acquia Web Governance. The former Monsido Contrast Checker URL redirects to Acquia’s checker, so buyers encountering the older name should look for the Acquia product. Choose it for straightforward, no-cost contrast checks and lightness adjustment; choose another option if your workflow depends on multiple contrast modes, suggested replacements, or batch review.
Acquia Color Contrast Checker (formerly Monsido Contrast Checker) pricing
Acquia Color Contrast Checker (formerly Monsido Contrast Checker) fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| WCAG standards | 2.2 |
| Contrast modes | Text |
| Contrast suggestions | No |
| Design integrations | Not verified |
| Platforms | web |
| Batch color-pair checks | No |
| Deployment | Cloud |
| Platforms | Web |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | acquia.com |
| Facts checked | 4 Oct 2026 |
Alternatives to Acquia Color Contrast Checker (formerly Monsido Contrast Checker)
- WebAIM Contrast CheckerA free web checker for text and UI contrast, with a basic API and bookmarklet.9.1
- Silktide Color Contrast CheckerA free Chrome extension for checking page text and interface contrast against WCAG.8.7
- Colour Contrast Analyser (CCA)A free desktop checker for precise, manual analysis of selected color pairs.8.5
See all Acquia Color Contrast Checker (formerly Monsido Contrast Checker) alternatives →
Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs the competition
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs WebAIM Contrast Checker
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs Silktide Color Contrast Checker
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs Colour Contrast Analyser (CCA)
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs Figma
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs Color Contrast
- Acquia Color Contrast Checker (formerly Monsido Contrast Checker) vs Colors on the Web Contrast Checker
Used Acquia Color Contrast Checker (formerly Monsido Contrast Checker)? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Acquia Color Contrast Checker (formerly Monsido 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.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Acquia Color Contrast Checker (formerly Monsido Contrast Checker) is listed in our Color Contrast Checker Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/acquia-color-contrast-checker-formerly-monsido-contrast-checker/"><img src="https://www.itechguides.com/best/badge/acquia-color-contrast-checker-formerly-monsido-contrast-checker.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.
Last updated · How we research and update