# io.github.vince-gonzalez/colorblind (npm · colorblind-mcp)

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

- Trust score: 80/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- npm · `colorblind-mcp`: 80/100 (this document), [markdown](https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp.md), [page](https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp)

## Channel facts

- Registry: `npm`
- Package: `colorblind-mcp`
- Version: `0.2.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-21.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 33 of 100 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 18 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 80/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 511 tokens (~127/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 63/100
  - Stability observed for 19 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.vince-gonzalez/colorblind MCP server?

io.github.vince-gonzalez/colorblind runs locally as an npm package, launched with npx -y colorblind-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add vince-gonzalez-colorblind -- npx -y colorblind-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "vince-gonzalez-colorblind": {
      "command": "npx",
      "args": [
        "-y",
        "colorblind-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "vince-gonzalez-colorblind": {
      "command": "npx",
      "args": [
        "-y",
        "colorblind-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add vince-gonzalez-colorblind -- npx -y colorblind-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "vince-gonzalez-colorblind": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "colorblind-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add vince-gonzalez-colorblind --command npx --arg -y --arg colorblind-mcp
```

### Hermes

```yaml
mcp_servers:
  vince-gonzalez-colorblind:
    command: "npx"
    args: ["-y", "colorblind-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "vince-gonzalez-colorblind": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "colorblind-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add vince-gonzalez-colorblind -t stdio -c npx -a -y colorblind-mcp
```

### Other

```json
{
  "mcpServers": {
    "vince-gonzalez-colorblind": {
      "command": "npx",
      "args": [
        "-y",
        "colorblind-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-21 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 75, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-03 (score 71, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-02 (score 56)

First indexed and scored.

## MCP tools (4)

### `simulateColor` (~114 tokens)

Simulate a color under colorblindness

Return how a single hex color appears to someone with a given type of color-vision deficiency (protan, deutan, or tritan). Set severity 0..1 for a partial deficiency (anomalous trichromacy); 1 is the full dichromat case.

Input parameters:

- `color` (string, required): Hex color, e.g. #d7191c
- `severity` (number): Deficiency strength 0..1 (default 1)
- `type` (string, required): Color-vision deficiency type

### `compareVision` (~74 tokens)

Show a color under all three deficiencies

Return how a single hex color appears under protanopia, deuteranopia and tritanopia at once, for a side-by-side comparison.

Input parameters:

- `color` (string, required): Hex color, e.g. #1a9641
- `severity` (number): Deficiency strength 0..1 (default 1)

### `simulateImage` (~189 tokens)

Recolor an image as a colorblind person sees it

Recolor an image, chart, screenshot or mockup the way someone with color-vision deficiency sees it, and return the recolored image. Use this to SHOW what a design looks like through colorblindness (to check whether it stays readable, pair it with cvdsafe's checkImage). Reads PNG and JPEG — pass `path` for a local file, or a base64 `dataUri`. `type` picks the deficiency (default deutan); `severity` 0..1 sets strength.

Input parameters:

- `dataUri` (string): Base64 data URI of the image, if you don't have a file path
- `path` (string): Path to a local PNG or JPEG file, e.g. ./chart.png
- `severity` (number): Deficiency strength 0..1 (default 1)
- `type` (string): Which deficiency to render (default deutan)

### `plate` (~134 tokens)

Generate an Ishihara-style color-vision test plate

Generate a pseudoisochromatic (Ishihara-style) test plate: a digit hidden in a field of dots whose colors are distinct to normal vision but collapse under the chosen deficiency. Returns the plate image. Use when asked to create a colorblindness test plate or demonstrate what a plate looks like. Reproducible from a seed.

Input parameters:

- `number` (string, required): The digit(s) to hide, e.g. "7" or "29"
- `seed` (integer): Same seed -> identical plate (default 1)
- `type` (string): Which deficiency the figure should collapse under (default deutan)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp#diagnostics

## Score history

- 2026-09-21: 80
- 2026-09-20: 79
- 2026-09-19: 79
- 2026-09-18: 78
- 2026-09-17: 78
- 2026-09-16: 77
- 2026-09-15: 77
- 2026-09-14: 76
- 2026-09-13: 76
- 2026-09-12: 75
- 2026-09-11: 75
- 2026-09-10: 75
- 2026-09-09: 71
- 2026-09-08: 71
- 2026-09-07: 71
- 2026-09-06: 71
- 2026-09-05: 71
- 2026-09-04: 71
- 2026-09-03: 71
- 2026-09-02: 56

## Common questions

### What is the io.github.vince-gonzalez/colorblind MCP server?

io.github.vince-gonzalez/colorblind is an MCP server listed in the public MCP registry as io.github.vince-gonzalez/colorblind. See a color or image as a colorblind person does; recolor images and make Ishihara plates. This page covers its npm package (colorblind-mcp).

### Is the io.github.vince-gonzalez/colorblind MCP server safe to use?

io.github.vince-gonzalez/colorblind scores 80 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.vince-gonzalez/colorblind MCP server expose?

io.github.vince-gonzalez/colorblind exposes 4 tools: simulateColor, compareVision, simulateImage, plate. Their descriptions and schemas cost roughly 511 tokens of context every time the server is loaded.

### Is the io.github.vince-gonzalez/colorblind MCP server still maintained?

io.github.vince-gonzalez/colorblind is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.vince-gonzalez/colorblind MCP server under?

io.github.vince-gonzalez/colorblind declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/colorblind-mcp
- Socket report: https://socket.dev/npm/package/colorblind-mcp
- Repository: https://github.com/vince-gonzalez/opticquiz.com
- Changelog RSS feed: https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp.json
- HTML version of this page: https://verifymcp.io/servers/vince-gonzalez-colorblind/colorblind-mcp