Flatsonar
Verified creator

Ratio

by Mark Wyner

WCAG color-contrast validation tool

Sandboxed Verified creator
Install Source code
Screenshot 1 Screenshot 2

About

Ratio uses WCAG algorithms to validate color contrast for accessibility. Specifically for the WCAG Success criteria 1.4.3 (text), 1.4.11 (non-text elements), and 2.4.13 (focus appearance). I made it for myself, but it is also my gift to you. (There’s also a macOS version available.)

Permissions

Everything this app can reach outside its sandbox. Nothing here weakens it.

  • inter-process communication (needed for X11)
    --share=ipc
  • X11 display, only when Wayland is unavailable
    --socket=fallback-x11
  • Wayland display
    --socket=wayland
  • GPU acceleration
    --device=dri

Who publishes this

The creator demonstrably controls this app id: Flathub verification, the hosting account owns the namespace, or a well-known file on their domain.

  • verified on Flathub: the developer proved they control this app id
    publisher:flathub

Maintenance

Recent activity on the upstream repository, or built and reviewed by Flathub.

No staleness signals: recent activity, or built and reviewed by Flathub.