HuefulShip color that everyone can read.
Hueful is a fast, 100% offline contrast checker for iPhone and iPad. Verify any color pair against WCAG 2.1 and APCA, preview color-vision deficiencies, and fix failing contrast in a tap.
Free · No account · Nothing leaves your device.
Everything you need to verify contrast
From a single text pair to an entire design system — checked locally, in real time.
WCAG 2.1 ratio
Instant contrast ratio with five-tier pass/fail badges: AA Normal, AA Large, AAA Normal, AAA Large, and UI Components.
APCA (Lc)
The perceptual contrast model from the WCAG 3 drafts, with polarity and font-tier guidance, shown beside WCAG 2.1.
Color-vision preview
See your colors through Protanopia, Deuteranopia, Tritanopia, and Achromatopsia, side by side with the original.
Photo eyedropper
Pick a color straight from any photo. Sampling happens on-device — no library permission, no upload.
Batch contrast matrix
Save palettes and check every color against every other in an N×N matrix — evaluate a whole system at once.
Export as code
Share a palette as an image, or copy it as Swift, SwiftUI, CSS, or JSON — ready to paste into your project.
Your colors never leave your device
Hueful collects no personal data, makes no network requests, and contains no analytics, ads, or tracking. Palettes you create are stored locally and only ever shared when you choose to.
Built for iPhone and iPad
A native SwiftUI experience that adapts from a single pane to a roomy two-column layout.
