How does this engine ensure color palettes look good?

The engine uses the LCH (Lightness, Chroma, Hue) color space instead of HSL. This ensures that when you shift hues, the perceived lightness and saturation remain constant, avoiding muddy colors.

Can I check if my brand color is accessible?

Yes. By using `calculate_accessibility`, you can check if your base HEX color meets WCAG 2.1 AA or AAA standards for both normal and large text against pure black and white.

Delta-E is a metric used to quantify the difference between two colors. This engine uses the CIEDE2000 formula to provide a value that matches how humans actually perceive color differences.

Color Accessibility Engine MCP Connector for Claude

A+

Deterministic color science for WCAG 2.1 compliance and LCH-based perceptual palettes.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides precise color science tools for designers and developers. Use calculate_accessibility to verify WCAG 2.1 contrast ratios against black and white benchmarks, ensuring text readability. Generate perceptually uniform color harmonies like complementary, triadic, or analogous palettes using generate_perceptual_palettes which utilizes the LCH color space to prevent desaturation. You can also measure the exact visual difference between two colors using compare_colors_perceptually via the CIEDE2000 Delta-E formula.

wcaglchcoloraccessibilitydesign-tools

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_69twE5mr5OOuWaSLhME69S8laGT4gfJyOHshUGv3/mcp

② Claude Code (terminal)

claude mcp add --transport http color-accessibility-engine https://edge.vinkius.com/vk_preview_69twE5mr5OOuWaSLhME69S8laGT4gfJyOHshUGv3/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "color-accessibility-engine": {
      "url": "https://edge.vinkius.com/vk_preview_69twE5mr5OOuWaSLhME69S8laGT4gfJyOHshUGv3/mcp"
    }
  }
}

Get full access on Vinkius

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