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Design & ValidateToolOpen sourceFree
Color Oracle
An open-source full-screen color-vision simulator that runs independently of art and engine tools on Windows, macOS, and Linux.
Visit official siteContent record updated Jul 31, 2026Official site reached automatically · Checked Aug 3, 2026
Why it’s here
Designers can quickly expose color-only states, low-distinction UI, and gameplay elements that are hard to tell apart.
Best fit
Prototype systems, stories, and interactions, then validate them with real players.
accessibilityvisual-design
Before you commit
Simulation is approximate and the application updates slowly; it does not replace contrast measurement or testing with color-impaired players.