Contrasta

About

Contrasta checks color contrast the moment you pick a color — no account, no internet, no waiting for a web tool to load. Pick a foreground and background with the color picker, hex entry, or a built-in eyedropper that samples a color straight from any photo in your library. Contrasta instantly shows the WCAG 2.x contrast ratio with AA/AAA pass badges for normal text, large text, and UI components, plus a live text preview so you can see exactly how legible your pairing really is. Designers and developers use Contrasta to sanity-check a brand palette before it ships, catch a low-contrast button during a design review, or verify a color pairing meets accessibility guidelines without leaving their phone. Included • Foreground/background color picker, hex entry & photo eyedropper • WCAG contrast ratio with AA/AAA/UI component pass badges • Live text preview at multiple sizes • Swap & shuffle colors • Save up to 3 color pairs Pro (one-time unlock) • APCA Lc score — the modern perceptual contrast metric proposed for WCAG 3 • Simulate protanopia, deuteranopia, tritanopia & achromatopsia • Batch tab — check every saved color pair against WCAG & APCA at once • Unlimited saved color pairs • Export a shareable contrast report Fully offline. Zero tracking. No subscription.