Color Oracle
Color Oracle helps designers preview how colors appear to people with color vision deficiencies.
About Color Oracle
Color Oracle is a color blindness simulator for Windows, Mac, and Linux. It applies a full-screen color filter over the artwork a designer is working on, showing in real time how people with common color vision impairments may see it. The filter works independently of the design software in use. The homepage describes the tool as free. Windows and Linux versions require Java 6 or higher, and macOS 10.15 Catalina users may need a fix described in the manual. The homepage lists version 1.3, dated May 5, 2018, and describes the project as a work in progress.
Key features
- Real-time simulation of common color vision impairments
- Full-screen color filter applied independently of the design software in use
- Downloads listed for macOS, Windows, and Linux
- Windows and Linux versions require Java 6 or higher
- Manual includes a fix for a common macOS 10.15 Catalina issue
- Linked article on color design for people with color vision impairments
Best for: Designers who want to check whether their graphics remain readable for people with color vision deficiencies.
Good for
- The homepage describes the tool as free
- Works with any design software because the filter is applied to the full screen
- Available for Windows, macOS, and Linux
Watch out for
- Windows and Linux versions require Java 6 or higher
- macOS 10.15 Catalina users may need a manual fix for a common issue
- The homepage describes the project as a work in progress, and the listed download is version 1.3 from May 2018
Color Oracle at a glance
- Website
- colororacle.org
- Category
- Design & Creative › Color Tools
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, macOS, Web, Windows
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Color Tools
Color Oracle alternatives
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ColorFish offers an open-source color picker, listed alongside the Ui.Vision browser automation tools.
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Realtime Colors previews color palettes and fonts on a website layout.
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Khroma learns a user’s color preferences and generates palettes for designers to discover and save.
Paletton helps designers create color schemes and combinations for visual projects.
Goodpalette generates color schemes for UI and UX design and previews them in dynamic app or website mockups.
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Color Oracle FAQ
Which operating systems does Color Oracle support?
The homepage lists downloads for macOS, Windows, and Linux.
What is required to run Color Oracle on Windows or Linux?
The homepage states that the Windows and Linux versions require Java 6 or higher.
Does Color Oracle need to be used inside a specific design program?
No. The homepage states that the color filter is applied to the full screen independently of the software in use.
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