Kontrast

Name: Kontrast
Author: The KDE contributors

A color contrast checker that helps assess whether color combinations are readable and accessible.

By The KDE contributors

Free Open sourceLinux

Official websiteapps.kde.org

Download pageflathub.org

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Alternatives

RatioRatio also checks color combinations against WCAG accessibility criteria and runs on macOS and Linux.
ContrasteContraste checks text and background combinations against WCAG thresholds on macOS, whereas Kontrast runs on Linux.
Color OracleA desktop color blindness simulator that applies a full-screen filter to show how designs may appear to viewers.
Color ReviewColor Review checks text and background contrast against WCAG 2.1 AA and AAA in a web tool rather than a Linux app.
Contrast RatioContrast Ratio calculates WCAG contrast in a web tool rather than providing a Linux app for checking color combinations.
ColorblindlyBrowser extension that simulates color blindness on any web page for accessibility testing.

See all alternatives

About Kontrast

Kontrast checks color combinations to tell you whether they are distinct enough to be readable and accessible. It is a KDE application for Linux, distributed through Flathub and distribution package managers.

Strengths

Checks color combinations for readability and accessibility
Available through Flathub and Linux package managers

Limitations

Linux only

Details

Pricing: FreeFree and open source under GPL-3.0-or-later.
License: GPL-3.0-or-later
Developer: The KDE contributors
Platforms: Linux
How it runs: Downloadable app
Best suited for: Designers and developers checking color contrast
Categories: Color tools
Last verified: October 8, 2026
Added: October 8, 2026
Provenance: Selected from the Flathub
Sources: apps.kde.org/kontrast

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