ContrastKit

dev.workers.mike-tusa.contrastkit/contrastkitVersion 0.1.0

WCAG color contrast checks, nearest accessible color, CSS color conversion and palette pair checks.

Status

Responds137 msNov 14, 2026, 14:28 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:28 UTC
Latency: 137 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://contrastkit.mike-tusa.workers.dev/mcpResponds137 msNov 14, 2026, 14:28 UTC

No sign-in

Claude Code

claude mcp add --transport http contrastkit https://contrastkit.mike-tusa.workers.dev/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: contrastkit
Remote MCP server URL: https://contrastkit.mike-tusa.workers.dev/mcp

Cursor

{
  "mcpServers": {
    "contrastkit": {
      "url": "https://contrastkit.mike-tusa.workers.dev/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"contrastkit","type":"http","url":"https://contrastkit.mike-tusa.workers.dev/mcp"}'

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Tools

4 tools

Tools of ContrastKit
	Description		Read-only	Idempotent	Open world
`check_contrast`Compute the WCAG 2.x contrast ratio between a text (foreground) color and a background color, with pass/fail for AA, AA large text, AAA, AAA large text and non-text UI (3:1). Handles translucent colors. Read-only. Same engine as GET /api/contrast.	Compute the WCAG 2.x contrast ratio between a text (foreground) color and a background color, with pass/fail for AA, AA large text, AAA, AAA large text and non-text UI (3:1). Handles translucent colors. Read-only. Same engine as GET /api/contrast.	No	Yes	Yes	No
`check_palette`Contrast ratio for every pair of 2 to 12 colors (up to 66 pairs), highest first, each flagged against the chosen WCAG level. Use it to see which brand colors can be used together for text. Read-only. Same engine as GET /api/palette.	Contrast ratio for every pair of 2 to 12 colors (up to 66 pairs), highest first, each flagged against the chosen WCAG level. Use it to see which brand colors can be used together for text. Read-only. Same engine as GET /api/palette.	No	Yes	Yes	No
`convert_color`Convert a CSS color to hex, rgb() and hsl(), with its relative luminance, its contrast on white and on black, and the better text color (black or white) to put on it. Read-only. Same engine as GET /api/convert.	Convert a CSS color to hex, rgb() and hsl(), with its relative luminance, its contrast on white and on black, and the better text color (black or white) to put on it. Read-only. Same engine as GET /api/convert.	No	Yes	Yes	No
`suggest_accessible_color`For a failing color pair, find the closest color (same hue and saturation, lightness changed as little as possible) that meets the chosen WCAG level. Adjust the foreground (default), the background, or both (best first). Read-only. Same engine as GET /api/suggest.	For a failing color pair, find the closest color (same hue and saturation, lightness changed as little as possible) that meets the chosen WCAG level. Adjust the foreground (default), the background, or both (best first). Read-only. Same engine as GET /api/suggest.	No	Yes	Yes	No

Details

Registry status: Active
Published: Oct 22, 2026
Updated: Oct 22, 2026
Website: https://contrastkit.mike-tusa.workers.dev/⁠ (opens in a new tab)
Repository: Not given
Categories: Uncategorized
GDPR: Not declared

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