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Usability68Design71Speed46Security63Accessibility84Growth58

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Measured on six things

Free WCAG color contrast checker for accessible design.

Speed

46

Lighthouse mobile 53/100 with a brutal 10.9s LCP and 7.0s FCP; desktop 51/100. CLS is a clean 0 and TBT is only 248ms, so the pain is render-blocking assets, not layout jank. Slow for a page whose whole job is arithmetic.

Screenshots

1 / 1

About this app

Accesstive Color Contrast Checker helps you test text and background color combinations against WCAG 2.2 AA and AAA standards. Enter HEX or RGB values, get an instant contrast ratio, and adjust colors live until they pass, so you can catch readability and compliance issues before they reach production.

Key features

  • 1Instant WCAG 2.2 contrast ratio from HEX or RGB input, with live AA/AAA pass-fail for small text, large text, and UI components.
  • 2Live lightness sliders and swap/reset controls so you can adjust colors in place until they pass, no design software required.
  • 3Bundled into the Accesstive platform: free checker as entry point to widget, 24/7 monitoring, AI and human audits, and statement generation.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Web Designers

Pain points

Ensuring visual appeal while meeting contrast standards can be tedious and error-prone.

Primary needs

A quick, accurate way to test color combinations and adjust them in real-time.

Demographic

Front-end Developers

Pain points

Accessibility bugs often surface late in development, causing rework and compliance risks.

Primary needs

Integration-ready contrast checks that can be automated or easily verified before deployment.

Demographic

Content Creators & Marketers

Pain points

Poorly contrasted graphics and text reduce engagement and exclude audience segments.

Primary needs

Simple tools to validate color choices for social media, infographics, and landing pages.

Demographic

Accessibility Officers & Compliance Managers

Pain points

Meeting legal standards like ADA and Section 508 requires thorough, documented checks.

Primary needs

Reliable WCAG validation and a path to broader audits and reporting.

Scout Review

Written by AI from measured evidence, scored out of 100.

Accesstive's Color Contrast Checker is a competent, no-nonsense utility that does the one thing it promises: enter two colors, get a WCAG 2.2 ratio, adjust live until it passes. The interface is clean, the flow is frictionless, and the accessibility audit is flawless. It's also slow — 10.9s LCP on mobile — and it sits in a category where the leading alternative is free and has been for years. The real product is the paid platform behind it (widget, monitoring, AI and human audits, statement generation), and the checker is the doorway. As a doorway, it works. As a standalone tool, it's a well-built version of something you can already get for nothing. Worth using if you're already in the Accesstive ecosystem; worth a bookmark if you just need a quick ratio and can tolerate the load time.

Measure by measure

Usability

68

Zero-friction core flow: paste HEX, get ratio, tweak live, no signup. Swap/reset and AA/AAA small/large text readouts are all on one screen. Help center exists but is aimed at the paid platform, not the free checker.

Design

71

Clean, focused tool UI: dual color panels, live sample text, instant ratio readout, HEX/RGB tabs and lightness sliders. Branding is consistent across the checker, help center and pricing. Judged on the web app itself, not a store listing.

Speed

46

Lighthouse mobile 53/100 with a brutal 10.9s LCP and 7.0s FCP; desktop 51/100. CLS is a clean 0 and TBT is only 248ms, so the pain is render-blocking assets, not layout jank. Slow for a page whose whole job is arithmetic.

Security

63

HTTPS enforced with HSTS, X-Content-Type-Options, SPF and DMARC in place (7/12 probe points). Missing CSP, frame protection, Referrer-Policy and Permissions-Policy. 2FA/SSO only on the top tier; no SOC 2 or pen-test claims found.

Accessibility

84

Lighthouse accessibility 100/100 with one flagged audit (visible text labels without matching accessible names). Fittingly, the product is itself an a11y tool and publishes WCAG 2.2 AA/AAA guidance. No published accessibility statement or VPAT on the checker page.

Growth

58

Real, evergreen problem (WCAG/ADA compliance) with a specific wedge: free checker as top-of-funnel into a paid widget/monitoring platform. But the checker itself is a commodity against WebAIM's free incumbent.

Improvement areas

  • Mobile performance: 10.9s LCP and 7.0s FCP on a page that only needs to render two color inputs and a ratio.
  • Security hardening: no CSP, frame protection, Referrer-Policy or Permissions-Policy; 2FA gated to the top pricing tier.
  • Documentation: help center covers the paid platform modules but has nothing specific to the free contrast checker's edge cases.

Design & Usability

The checker is a tight, single-screen tool: foreground and background panels with HEX/RGB tabs, a lightness slider, live small/large sample text, and an instant ratio readout with AA/AAA pass/fail for both text sizes and UI components. Swap and reset are right there. No signup, no modal, no 'start your free trial' wall before you can check a color — which is exactly the right call for a utility. The branding carries cleanly from the checker into the help center and pricing pages, so it reads as one product rather than a bolt-on. The weak spot is the help center: it's organized around the paid platform's six modules (Widget, AI Audit, Monitor, Accy, Billing, Integrations) and offers nothing specific to the free contrast checker. A designer who hits an edge case — gradients, images behind text, non-solid backgrounds — gets no guidance, and the site's own disclaimer admits the tool only handles solid color pairs. Good tool, thin support around it.

Speed & Security

Speed is the sore spot. Lighthouse mobile performance lands at 53/100 with an LCP of 10.9 seconds and FCP of 7.0 seconds; desktop is 51/100. CLS is a clean 0 and TBT is a modest 248ms, so the problem isn't layout instability or heavy JavaScript execution — it's render-blocking resources delaying first paint on a page whose entire function is a luminance calculation. For a tool people open mid-design-review, that's a real friction cost. Security is more balanced: HTTPS is enforced with HSTS, X-Content-Type-Options is set, and SPF and DMARC are configured, giving 7 of 12 probe checklist points. Missing are CSP, frame protection, Referrer-Policy and Permissions-Policy — standard hardening that a compliance-adjacent product should arguably lead on. On the account side, 2FA and SSO are gated to the top Growth tier (€198/mo), and no SOC 2, ISO or pen-test documentation surfaced in the fetched content, so enterprise buyers have nothing to hand their security team.

Accessibility & Growth

Accessibility is where this product has to be judged hardest, and it mostly holds up: Lighthouse scores 100/100, with a single flagged audit for elements whose visible text labels don't match their accessible names. The site publishes clear WCAG 2.2 AA/AAA reference material — 4.5:1 and 3:1 for text, 3:1 for UI components — and the tool surfaces those thresholds directly in the readout. What's missing is the paperwork: no accessibility statement, no VPAT/ACR on the checker page, which is ironic for a company selling conformance reports on its paid tiers. On growth, the idea is sound and evergreen — WCAG compliance is a legal requirement under ADA and Section 508, and the free checker is a sensible top-of-funnel into the €19–€198/mo platform. The problem is differentiation: WebAIM's checker is free, entrenched, and does the same solid-color math, and Stark owns the in-design-file workflow. The wedge here is the bundled platform, not the checker itself.

Conclusion

If you need a contrast ratio right now and you're already paying for Accesstive, this is the obvious place to get it. If you're a solo designer or a dev who just wants to check a hex pair, WebAIM's checker loads faster and costs the same (nothing). The honest read: this is a solid lead magnet attached to a real accessibility platform, and it's judged as such. Fix the LCP, publish an accessibility statement for your own accessibility tool, and stop gating 2FA behind the €198 tier — those three moves would make this a genuinely easy recommendation instead of a conditional one.

Suggestions for improvement

  • Cut the 10.9s mobile LCP: audit render-blocking CSS/JS and defer or inline what the checker actually needs on first paint.
  • Publish an accessibility statement and VPAT for the checker itself — an a11y company selling conformance reports should have its own on the free tool.
  • Add guidance for non-solid backgrounds (gradients, images, overlays) or link to a companion tool; the disclaimer admits the gap but offers no path.
  • Move 2FA off the top tier. Gating basic account security behind €198/mo is a bad look for a compliance product.
How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

Accesstive Color Contrast CheckerWebAIM Contrast CheckerStark (Figma/Sketch Plugin)
Price for the contrast checking toolFree checker; bundled into paid platform from €19/moCompletely free, no accountFree tier; paid plans for teams
Input formats supportedHEX and RGB with lightness slidersHEX onlyNative color pickers inside Figma/Sketch
Works outside design software (browser-based)Yes, standalone web toolYes, standalone web toolNo, requires Figma/Sketch plugin
WCAG standard coverageWCAG 2.2 AA/AAA for text and UI componentsWCAG 2.x AA/AAA text contrastWCAG AA/AAA plus broader a11y checks
Broader accessibility platform beyond contrastYes: widget, monitoring, AI/human audits, statementsNo, single-purpose toolPartial: design-time a11y checks and reporting

WebAIM Contrast Checker

A popular free tool for checking color contrast ratios against WCAG guidelines, offering similar HEX input and ratio feedback but with fewer integrated accessibility workflow features.

Stark (Figma/Sketch Plugin)

A design tool plugin that checks contrast within design files, offering real-time feedback but limited to supported design software environments.

Comparing options? See Accesstive Color Contrast Checker alternatives, scored side by side

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