Colorblind

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Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/vince-gonzalez-colorblind

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What this server can do and what it asks for, from its tool list, install config and code. Checked Oct 26, 2026.

Tools

6 read · 0 write · 0 delete · 3 not yet classified

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Runs as

Node.js package

Tools (9)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• checkContrastCheck text/background contrast against WCAG

  Check whether a foreground color is legible on a background color per WCAG 2.x contrast ratios. Returns the ratio (1-21) and whether it passes AA and AAA. Set large=true for text >=18pt (or 14pt bold). This is the legibility axis, separate from color-blindness.

• checkImageCheck an image for colorblind-safety

  Check whether the colors in an image, chart, screenshot or mockup stay distinguishable for people with color-vision deficiency. Extracts the image's dominant colors, simulates protanopia, deuteranopia and tritanopia, and flags the color pairs that collapse into each other — each with how much of the image's area those colors cover, so a conflict between two large regions ranks above one between two specks. Reads PNG and JPEG. Pass `path` for a local file, or a base64 `dataUri`. Set returnSimulated=true to also get back the image as a deuteranope sees it. A screening aid, not a legal (ADA/WCAG)…

• checkPaletteCheck a color palette for colorblind-safety

  Check whether a set of colors stays distinguishable for people with color-vision deficiency (colorblindness). Simulates protanopia, deuteranopia and tritanopia and flags the pairs whose perceptual difference collapses under simulation. A screening aid, not a legal accessibility (ADA/WCAG) audit.

• compareVisionShow 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.

• fixPaletteFix a palette to be colorblind-safe

  Take a set of colors that fails the colorblind-safety check and return an adjusted set that passes, staying as close to the originals as possible. Conflicting colors are separated in lightness (the axis color-vision deficiency preserves). Returns the new colors, how far each moved, and whether it fully passes.

• generateSafePaletteGenerate a colorblind-safe palette

  Return N colorblind-safe hex colors — distinct to each other under protanopia, deuteranopia and tritanopia. Seeded with the Okabe-Ito palette and safely extended above eight. Use when asked for accessible / colorblind-safe / colorblind-friendly colors for a chart, plot, map or UI. Never returns an unsafe color.

• plateGenerate 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.

• simulateColorSimulate 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.

• simulateImageRecolor 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.

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Last commit

Oct 5, 2026 (23 days ago)

Last release

Sep 2, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name

io.github.vince-gonzalez/colorblind

Version

0.2.0

Auth

No auth

Packages

npm colorblind-mcp

License

MIT

Repository

github.com/vince-gonzalez/opticquiz.com

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registrygithub-graphql