How to Use the Color Contrast Checker MCP in VS Code Copilot

Standardize team accessibility testing in VS Code Copilot with the Color Contrast Checker MCP server.

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Connect Color Contrast Checker MCP to VS Code Copilot

Create your Vinkius account to connect Color Contrast Checker to VS Code Copilot and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Color Contrast Checker with VS Code Copilot

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Deploy accessibility tools in VS Code Copilot

Commit your mcp.json file to the repository to share the `check_color_contrast` tool with your entire engineering team. Everyone gets the same testing capabilities. This ensures that every developer is checking the same WCAG standards. It removes inconsistency in how your team handles visual design.

Audit UI surfaces in VS Code Copilot

Use `check_dark_mode_surface` and `check_light_mode_surface` to verify your team's design tokens against common backgrounds. These tools provide objective data for your pull requests. By running these checks, you verify accessibility before a human peer review even happens. It speeds up your development cycle significantly.

Check specific contrast cases in VS Code Copilot

The `check_black_text_on_bg` and `check_white_text_on_bg` tools give your team a quick way to audit specific components. You can verify your brand's primary colors against any background. These tools help you maintain your design system's integrity. You can rely on the agent to give you a pass or fail result for every check.

Setup guide

Set up Color Contrast Checker MCP in VS Code Copilot

Prerequisites

VS Code 1.99 or later with GitHub Copilot extension
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and run "MCP: Add Server". Select HTTP (Streamable) as the server type. VS Code will create .vscode/mcp.json in your workspace.
2

Add the Color Contrast Checker MCP

Paste the JSON snippet shown on the right into your .vscode/mcp.json. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Switch to Agent mode

Open Copilot Chat (Cmd+Shift+I / Ctrl+Shift+I) and switch to Agent mode using the dropdown. MCP tools are only available in Agent mode — they do not appear in Edit or Ask modes.
4

Verify the connection

In the Copilot Chat input, type # to list available tools. You should see the Color Contrast Checker tools listed. Try asking: "List my recent Color Contrast Checker transactions" and Copilot will invoke them automatically.

.vscode/mcp.json

{
  "mcpServers": {
    "color-contrast-checker-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by WCAG Color Contrast. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Color Contrast Checker MCP in VS Code Copilot

Add the server to your shared .vscode/mcp.json file in your project root. This makes the tools available to every team member who opens the repo.

Yes, the tool is ephemeral and only processes the color codes you pass to it. It follows standard MCP security protocols to keep your environment isolated.

You can include these checks in your agent-driven workflows. It helps ensure that your team maintains high accessibility standards across all components.

The server treats your hex codes as transient input for calculation. It does not cache or persist your UI color data after the request completes.

It integrates directly with your existing Git-based workflow. Your team can maintain uniform accessibility standards without leaving the IDE.

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