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Contrast Checker — Generic Text Workspace

generic-text workspace — paste color pairs for notes; no automatic WCAG ratio math

How to Use This Tool

  1. Paste foreground and background hex values into textarea.
  2. Click Transform — passthrough for contrast-checker slug.
  3. Document color pairs and target WCAG level in notes.
  4. Use WebAIM Contrast Checker for ratio calculation.
  5. Copy audit notes for accessibility tickets.
  6. Pair with color-blindness-simulator honestly — tor-exit placeholder.

About This Tool

Accessibility auditors verifying WCAG 2.1 AA compliance need contrast ratios between text and background colors — 4.5:1 for normal text, 3:1 for large text. VSPIC contrast-checker maps to type client, kind generic-text in missing-tools-handlers.generated.ts — textarea plus Transform for browser-only local text processing.

Transform passthrough returns input unchanged today. Calculate contrast manually with (L1+0.05)/(L2+0.05) relative luminance formula or use WebAIM Contrast Checker until dedicated WCAG calculator client ships.

Common use cases

  • •Inspect HTTP headers and user-agent strings
  • •Analyze email headers for phishing investigation
  • •Generate strong passwords for staging environments

Why use VSPIC for ?

  • Honest generic-text passthrough documentation.
  • Local workspace for contrast audit notes.
  • Client-side — unreleased brand colors stay private.
  • WCAG threshold guidance in SEO sections.
  • Copy output for a11y audit tickets.
  • Free without account.

Contrast checker expectations versus generic-text

Real checkers compute relative luminance from hex or RGB inputs and report ratio against WCAG AA and AAA thresholds.

contrast-checker slug lacks ratio calculation in transformText today.

WCAG contrast thresholds

AA normal text 4.5:1. AA large text 3:1. AAA normal 7:1. Large is 18pt+ or 14pt bold.

Relative luminance formula

Convert sRGB channels to linear RGB, compute L = 0.2126R + 0.7152G + 0.0722B, ratio = (lighter+0.05)/(darker+0.05).

generic-text passthrough

Transform returns input unchanged for contrast-checker slug.

WebAIM Contrast Checker alternative

webaim.org/resources/contrastchecker/ — industry standard free ratio calculator.

Relationship to color-blindness-simulator

color-blindness-simulator maps to tor-exit — not vision simulation. Document both limitations in audits.

Future dedicated contrast client

Registry may add client-side luminance calculator. Update on missing-tools-handlers.generated.ts change.

Client-side privacy

Unreleased brand color pairs stay local on paste.

axe DevTools integration

Automated a11y scans in browser complement manual contrast verification on components.

Important notes & limitations

  • No automatic WCAG contrast ratio calculation.
  • generic-text passthrough only.
  • Does not simulate color blindness — color-blindness-simulator is tor-exit.
  • Not a replacement for WebAIM or axe DevTools.
  • Watch missing-tools-handlers.generated.ts for dedicated checker client.

Frequently Asked Questions

Yes. VSPIC offers this contrast checker at no cost with no account required. Results load in real time.

We do not permanently store your queries on our servers. Some tools run entirely in your browser; others fetch public data for the request only.

Yes. Open the page in any modern phone or tablet browser. Results work on Wi‑Fi and mobile data.

Not automatically. generic-text passthrough. Use WebAIM Contrast Checker.

AA 4.5:1 normal text is common compliance target. AAA 7:1 for enhanced.

No. color-blindness-simulator maps to tor-exit — unrelated placeholder.

No. generic-text runs locally in browser.

Client kind generic-text in missing-tools-handlers.generated.ts.

Registry may add dedicated client. Content updates on handler change.

Next step for your check

Continue with color picker on VSPIC.

Color Picker

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