Colorblind

See a color or image as a colorblind person does; recolor images and make Ishihara plates.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "colorblind": {
      "command": "npx",
      "args": [
        "-y",
        "colorblind"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

Code

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║             ██║   ██║██████╔╝   ██║   ██║██║     ██║   ██║██║   ██║██║  ███╔╝              ║
║             ██║   ██║██╔═══╝    ██║   ██║██║     ██║▄▄ ██║██║   ██║██║ ███╔╝               ║
║             ╚██████╔╝██║        ██║   ██║╚██████╗╚██████╔╝╚██████╔╝██║███████╗             ║
║              ╚═════╝ ╚═╝        ╚═╝   ╚═╝ ╚═════╝ ╚══▀▀═╝  ╚═════╝ ╚═╝╚══════╝             ║
║                                                                                            ║
║                 your eyes, tested in the browser, with nothing leaving it                  ║
║                                                                                            ║
╚════════════════════════════════════════════════════════════════════════════════════════════╝

opticquiz.com is a set of vision tests that run entirely on the device. No account, no upload, no image ever sent anywhere - the results exist in the tab and vanish with it.

The tests

Colour vision, D-15 arrangement, hue discrimination, anomaloscope-style matching, contrast sensitivity, acuity, astigmatism, Amsler grid, blind spot, vernier alignment, flicker fusion, saturation, dominance and reaction.

A test on a web page cannot be a diagnosis: an uncalibrated display, ambient light and viewing distance all move the result. Each test says so where it reports, and points at an eye examination rather than standing in for one.

Also in here

Translations (de, es, fr, hi, it, pt, zh), a browser extension, a VS Code extension, a Figma plugin, an embeddable widget, and the research notes behind the plate colours under research/.

Code

╔════════════════════════════════════════════════════════════╗
║                                                            ║
║      ███████╗      ██╗  ██╗███████╗██╗   ██╗███████╗       ║
║      ██╔════╝      ██║ ██╔╝██╔════╝╚██╗ ██╔╝██╔════╝       ║
║      █████╗  █████╗█████╔╝ █████╗   ╚████╔╝ ███████╗       ║
║      ██╔══╝  ╚════╝██╔═██╗ ██╔══╝    ╚██╔╝  ╚════██║       ║
║      ██║           ██║  ██╗███████╗   ██║   ███████║       ║
║      ╚═╝           ╚═╝  ╚═╝╚══════╝   ╚═╝   ╚══════╝       ║
║                                                            ║
║               ·   C  R  E  A  T  I  V  E   ·               ║
║                                                            ║
║          ────────────────────────────────────────          ║
║                                                            ║
║                      Vincent Gonzalez                      ║
║                         f-keys.com                         ║
║                 ORCID 0009-0005-3640-014X                  ║
║                                                            ║
╚════════════════════════════════════════════════════════════╝

Part of F-Keys — independent hardware, software and internet products. See the working log and live status.

Read the full README →View source on GitHub →

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Frequently Asked Questions about Colorblind

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "colorblind": { "command": "npx", "args": ["-y", "colorblind"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

27Quality signal: Emerging · 27/100How this signal is calculated ▾

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Colorblind →Install in Claude Desktop Install in Cursor Install in VS Code

Documentation Overview

Code

╔════════════════════════════════════════════════════════════════════════════════════════════╗
║                                                                                            ║
║              ██████╗ ██████╗ ████████╗██╗ ██████╗ ██████╗ ██╗   ██╗██╗███████╗             ║
║             ██╔═══██╗██╔══██╗╚══██╔══╝██║██╔════╝██╔═══██╗██║   ██║██║╚══███╔╝             ║
║             ██║   ██║██████╔╝   ██║   ██║██║     ██║   ██║██║   ██║██║  ███╔╝              ║
║             ██║   ██║██╔═══╝    ██║   ██║██║     ██║▄▄ ██║██║   ██║██║ ███╔╝               ║
║             ╚██████╔╝██║        ██║   ██║╚██████╗╚██████╔╝╚██████╔╝██║███████╗             ║
║              ╚═════╝ ╚═╝        ╚═╝   ╚═╝ ╚═════╝ ╚══▀▀═╝  ╚═════╝ ╚═╝╚══════╝             ║
║                                                                                            ║
║                 your eyes, tested in the browser, with nothing leaving it                  ║
║                                                                                            ║
╚════════════════════════════════════════════════════════════════════════════════════════════╝

opticquiz.com is a set of vision tests that run entirely on the device. No account, no upload, no image ever sent anywhere - the results exist in the tab and vanish with it.

The tests

Also in here

Translations (de, es, fr, hi, it, pt, zh), a browser extension, a VS Code extension, a Figma plugin, an embeddable widget, and the research notes behind the plate colours under research/.

Code

╔════════════════════════════════════════════════════════════╗
║                                                            ║
║      ███████╗      ██╗  ██╗███████╗██╗   ██╗███████╗       ║
║      ██╔════╝      ██║ ██╔╝██╔════╝╚██╗ ██╔╝██╔════╝       ║
║      █████╗  █████╗█████╔╝ █████╗   ╚████╔╝ ███████╗       ║
║      ██╔══╝  ╚════╝██╔═██╗ ██╔══╝    ╚██╔╝  ╚════██║       ║
║      ██║           ██║  ██╗███████╗   ██║   ███████║       ║
║      ╚═╝           ╚═╝  ╚═╝╚══════╝   ╚═╝   ╚══════╝       ║
║                                                            ║
║               ·   C  R  E  A  T  I  V  E   ·               ║
║                                                            ║
║          ────────────────────────────────────────          ║
║                                                            ║
║                      Vincent Gonzalez                      ║
║                         f-keys.com                         ║
║                 ORCID 0009-0005-3640-014X                  ║
║                                                            ║
╚════════════════════════════════════════════════════════════╝

Part of F-Keys — independent hardware, software and internet products. See the working log and live status.