Color Contrast / WCAG Checker

How contrast math works in seconds: Enter two hex colors and the tool converts each to relative luminance with human-weighted red, green, and blue channels, then divides the lighter by the darker with the standard offset. Ratios span one to twenty-one to one. A $1,400 Austin landing pair scores in seconds on 03/10/2026 locally.

Reading AA, AAA, and text-size verdicts: Normal text needs 4.5 to 1 for AA and 7 to 1 for AAA, while large text and UI components pass at 3 to 1. Select the matching size so verdicts reflect the real requirement. A Chicago auditor clearing $6,500 of components on 06/20/2026 records each verdict in USD-linked compliance notes.

Fixing failures without redesigning: Darken light text, lighten busy backgrounds, add overlays behind hero copy, or bump failing body copy to large bold treatment. Small moves often gain two full points. A Miami freelancer rescuing $900 of buttons on 07/15/2026 darkens one shade and retests instantly.

Privacy and local browser execution: Everything runs locally in your browser with zero uploads, so confidential palettes stay on your device and never touch a server. There is no account, no tracking, and no logging at any step. Whether it is an Austin freelancer handling a $350 client file or a New York team processing a $11,000 production batch, the work stays private, free, and instantly offline with no signup required ever.

American workflow and everyday reliability: Chicago users run this contrast checker during a $1,400 project review dated 03/10/2026, Miami teams verify a $4,200 deliverable before the 06/20/2026 deadline, and Denver and Seattle colleagues recheck results ahead of 07/15/2026. Amounts stay in USD with plain formatting, dates use MM/DD/YYYY, and a 09/15/2026 audit pass confirms the same output twice. It is a small, dependable step that fits any checklist.

Nationwide compliance and repeatable routine: Austin teams file a $2,400 example on 03/10/2026 and recheck it before 06/20/2026, Chicago managers approve a $6,800 batch ahead of 07/15/2026, and Miami, Denver, Seattle, and New York colleagues repeat the same pass before 09/15/2026 with every amount tracked in USD. The routine stays identical each quarter because local execution removes server variance, free access removes budget friction, and plain outputs remove ambiguity for reviewers. New hires learn the flow in minutes, veterans trust it under deadline pressure, and auditors accept the repeatable trail without extra tooling or follow-up meetings across departments. Each rerun finishes in seconds with identical formatting, so monthly reviews compare cleanly across seasons and leadership sees stable numbers. Support tickets drop because everyone follows the same documented clicks.