ContrastaWCAG & APCA, fully offline

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.

WHAT MAKES CONTRASTA DIFFERENT

• 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

PRICING

Contrasta is free, with the color picker, hex entry, photo eyedropper, WCAG contrast ratio, and up to 3 saved color pairs included. Contrasta Pro is a one-time unlock — no subscription — that adds the APCA Lc score (the modern perceptual metric proposed for WCAG 3), colorblindness simulation for protanopia, deuteranopia, tritanopia, and achromatopsia, a batch tab to check every saved pair at once, unlimited saved color pairs, and a shareable contrast report export. Fully offline, zero tracking.

FEEDBACK

Made by a small indie team. Email obeliskclubclub@gmail.com with feedback, bug reports, or feature requests.

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