ContrastKit

dev.workers.mike-tusa.contrastkitPublished by contrastkit.mike-tusa.workers.devOfficial publisherv0.1.0Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executable

Overview

ContrastKit's hosted MCP server (contrastkit.mike-tusa.workers.dev), published by contrastkit.mike-tusa.workers.dev; no sign-in required; Streamable HTTP; 4 tools.

No AI overview yet: these facts come from the registry entry and the server itself.

Publisher
contrastkit.mike-tusa.workers.dev
Endpoint
contrastkit.mike-tusa.workers.dev
Last checked

Installation

In SourceWeft

  1. Open ContrastKit in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.mike-tusa.contrastkit%2Fcontrastkit/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

4

check_contrast

Check WCAG color 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.

Parametersbackgroundrequiredforegroundrequired

suggest_accessible_color

Suggest the nearest 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.

Parametersleveladjustbackgroundrequiredforegroundrequired

convert_color

Convert a CSS 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.

Parameterscolorrequired

check_palette

Check every pair in a 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.

Parameterslevelcolorsrequired

Version history

1
  1. v0.1.0LatestOct 22, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.