Cvdsafe

Name: Cvdsafe
Author: vince-gonzalez

by vince-gonzalezversion 0.2.0i★ –iRuns on your computer

Registry nameio.github.vince-gonzalez/cvdsafe

Install

Overview

Description from the maker (original English)

Check if a palette or image is colorblind-safe, generate safe palettes, check WCAG contrast.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 46/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Design, images & audio

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

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

Run this in your terminal

claude mcp add cvdsafe -- npx -y cvdsafe-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "cvdsafe": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "cvdsafe-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account vince-gonzalez, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Design, images & audioi

More stars than 0% of the other 2782 servers in this category
Published to the registry more recently than 28% of the other 2782 servers in this category
Basic checks equal to or better than 100% of the other 2782 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Cvdsafe safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Figma Context MCP

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by GLipsWidely used↓ 161.2K/wk★ 16.2KUpdated 5 months ago

Runs on your computer

Install

Claude Real Video

Let any LLM watch a video locally — and search everything it has ever watched.

by HUANGCHIHHUNGLeoWidely used↓ 1.1K/wk★ 2.3KUpdated 2 months ago

Runs on your computer

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Figma MCP Server

Figma’s official server gives AI your design data so it can turn designs into code or describe them accurately. Connects to Figma’s cloud.

by figmaGrowing★ 2.2KUpdated 13 months ago

Runs in the cloud✓ mcp.figma.com

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

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An open, published method for color vision — and 17 vision tests built on it. Everything runs on the device. No account, no upload, no image ever sent anywhere.

The colorimetry is not a private formula: it is Machado, Oliveira & Fernandes (2009) deficiency simulation with CIEDE2000 color difference, published open access at [doi.org/10.5281/zenodo.21310578](https://doi.org/10.5281/zenodo.21310578), and shipped as packages so you can run the math yourself and check our numbers against yours.

Use the engine

pip install cvdsafe          # is this palette colorblind-safe?

npm install cvdsafe

import cvdsafe

cvdsafe.is_safe(["#d7191c", "#1a9641"]) # False — red and green collapse under deutan

npx cvdsafe "#d7191c" "#1a9641"           # exits 2 if the palette is unsafe — CI-friendly

what you want	package
Is this palette safe?	`cvdsafe` · npm + PyPI, with a CLI
Show me how it looks	`cvdsim` — recolors an image for protan/deutan/tritan
Give me safe colors	`safepalette` — Okabe–Ito, extended and verified
For matplotlib	`cvdmaps` — `set_cycle()` and you're safe
Make test plates	`cvdplate` · `ishihara`
Acuity math	`logmar` — logMAR ↔ Snellen ↔ decimal
One deficiency	`protan` · `deutan` · `tritanopia` · `dichromacy` · `achromatopsia` · `trichromacy`

For LLM tools: cvdsafe-mcp and colorblind-mcp are MCP servers, listed in the official Model Context Protocol registry — so an assistant can check a palette or generate an Ishihara plate as a native tool.

The tests

Color vision, D-15 arrangement, hue discrimination, anomaloscope-style matching, contrast sensitivity, acuity, astigmatism, Amsler grid, blind spot, vernier alignment, flicker fusion, saturation, dominance, reaction, stereo depth, digital eye strain, and a shape-based test for kids.

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.

Audit it yourself. opticquiz.com/methodology answers the eight questions worth asking of any online vision test — who made it, what it measures, what it assumes about your screen, whether it has been clinically validated (it has not), what it cannot measure, and who pays for it.

Also in here

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

MIT licensed. Issues and corrections welcome — if a number here disagrees with yours, that is a bug worth reporting.

╔════════════════════════════════════════════════════════════╗

║ ║ ║ ███████╗ ██╗ ██╗███████╗██╗ ██╗███████╗ ║ ║ ██╔════╝ ██║ ██╔╝██╔════╝╚██╗ ██╔╝██╔════╝ ║ ║ █████╗ █████╗█████╔╝ █████╗ ╚████╔╝ ███████╗ ║ ║ ██╔══╝ ╚════╝██╔═██╗ ██╔══╝ ╚██╔╝ ╚════██║ ║ ║ ██║ ██║ ██╗███████╗ ██║ ███████║ ║ ║ ╚═╝ ╚═╝ ╚═╝╚══════╝ ╚═╝ ╚══════╝ ║ ║ ║ ║ · 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.

Cvdsafe

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

Use the engine

The tests

Also in here