Contrasta

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.

Terms of Use (EULA): https://obelisk.club/contrastchecker/terms