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Color Converter MCP Server

Provides a comprehensive color toolkit for format conversion, manipulation, analysis, and accessibility within MCP-enabled workflows.

Installation

Add the following to your MCP client configuration file.

Configuration

View docs

{
  "mcpServers": {
    "bennyzen-mcp-accessibility-checker": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-color-convert@latest"
      ]
    }
  }
}

You can run and use the Color Converter MCP server to perform color format conversions, manipulations, analysis, and accessibility checks within your MCP-enabled development workflow. It provides a complete color toolkit that integrates with your AI coding agents to streamline design system work, web development, data visualization, and accessibility compliance using perceptual color spaces.

How to use

You will connect an MCP client to the Color Converter server using a standard MCP transport. The server exposes a set of tools you can invoke from your agent to convert colors between formats, adjust color properties, analyze accessibility, generate palettes, and more. Use natural language prompts or structured tool calls to perform tasks such as converting a color to OkLCH, lightening a color, or checking WCAG contrast against a background.

How to install

Prerequisites: you need Node.js 18+ installed on your machine. You will run the server locally via a CLI command that installs the package on demand if needed.

# Quick install and run using the MCP client integration
npx -y mcp-color-convert@latest

Additional setup and usage notes

To use this MCP server with your agent, configure the MCP client to launch the server as a stdio transport. The following configuration shows how to set the color converter as a local, self-installing MCP server. This keeps the server ready for inquiries like converting colors, generating palettes, and analyzing accessibility.

{
  "servers": [
    {
      "name": "color-converter",
      "description": "AI-powered color conversion, manipulation, analysis, and accessibility tools for design systems",
      "transport": {
        "type": "stdio",
        "command": "npx",
        "args": ["-y", "mcp-color-convert@latest"]
      }
    }
  ]
}

Security and maintenance

The server relies on your MCP client to manage the lifecycle. Ensure you restart your MCP client after configuration changes. Regularly update the mcp-color-convert package to keep features and compatibility current.

Troubleshooting

If the server fails to start or respond, verify Node.js 18+ is installed, clear caches if needed, and re-install dependencies. Ensure the MCP client is configured to launch the server correctly and that the path to the npx command is accessible.

# Example: verify server command by attempting to start the process directly
node -e "console.log('ready')"  # should start with a waiting state in the MCP client

Notes

This server supports a broad set of color formats and tools for conversion, manipulation, analysis, and accessibility. You can convert between HEX, RGB(A), HSL(A), OkLCH, and OkLab spaces, preserve or drop alpha depending on the target format, and perform actions like lightening, darkening, saturating, rotating hue, and comparing contrast.

Available tools

convert

Universal color format converter between supported formats including hex, rgb, rgba, hsl, hsla, oklch, and oklab with alpha preservation across alpha formats.

lighten

Increase the lightness of a color by a percentage amount.

darken

Decrease the lightness of a color by a percentage amount.

saturate

Increase color saturation/intensity by a percentage amount.

desaturate

Decrease color saturation/intensity by a percentage amount.

invert

Create the complementary color by rotating hue by 180 degrees.

grayscale

Convert a color to grayscale using perceptual OkLCH.

rotate

Rotate the hue around the color wheel by a number of degrees.

luminance

Compute WCAG relative luminance on a 0-1 scale.

chroma

Evaluate color intensity/purity on a 0-1 scale.

opacity

Extract alpha/opacity value from a color that supports transparency.

name

Return a common color name or hex if unnamed.

palette

Generate a 6-color harmonious palette from a base color.

scheme

Generate color harmonies such as complementary or triadic schemes.

swatch

Create an 11-step design system swatch (50-950).

random

Generate a random color in a specified format.

contrast

Calculate WCAG contrast ratio between two colors.

compare

Full WCAG compliance analysis with recommendations.

text_color

Suggest optimal text color (black or white) for a given background.

is_valid_color

Validate whether a color string can be parsed.