• PASS
  • FAIL
  • ADJUST
  • HUMAN

How to validate UI color accessibility with your AI

Connect the Color Contrast Checker to your AI client once. After that, you can simply paste hex codes into your chat to run accessibility audits.

Ask AI about this page

Short answer

How can I check if my UI colors meet accessibility standards?

Give your AI the hex codes for your foreground and background colors. It uses the check_color_contrast tool to verify if they meet WCAG 2.1 AA or AAA requirements. You'll get a clear pass or fail report for each pair.

Where your results land.

The outcome of your audit.

The AI processes your color data and organizes the findings into these categories.

PASS

Compliant pairs

The AI identifies color combinations that meet your target WCAG level. You get a list of safe colors to use in your design.

FAIL

Accessibility gaps

The AI flags combinations that fall short of AA or AAA standards. This shows you exactly where your contrast is too low.

ADJUST

Suggested fixes

When a pair fails, the AI identifies the specific gap. You'll know how much more contrast you need to reach compliance.

HUMAN

Design decisions

The AI provides the data, but you decide which color shifts look best. You handle the final visual balancing of the UI.

The workflow

What your AI does when colors arrive.

The AI handles the math and the standard comparisons so you don't have to.

  1. Receive hex codes

    Your agent takes the color values you provide in chat, such as hex codes or RGB values.

    check_color_contrast

  2. Run contrast math

    The AI calculates the relative luminance and contrast ratio between the two colors.

    check_color_contrast

  3. Compare to WCAG

    The agent checks the calculated ratio against the specific AA and AAA thresholds.

    check_color_contrast

  4. Report findings

    The AI tells you if the pair passes or fails and identifies the specific standard missed.

    check_color_contrast

Try it

Copy these to start.

Paste these directly into your chat to begin an audit.

Starting points

Swap out the hex codes in these examples with the actual colors from your design file.

colord Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_hc2RovnBSudbXvkpfLpH4ef2sc9X9Pt3zfhUEHq9/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — colord capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "color-contrast-checker-alternative-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_hc2RovnBSudbXvkpfLpH4ef2sc9X9Pt3zfhUEHq9/mcp"
    }
  }
}
Copy into chat04

  • Check if hex #FFFFFF and #000000 meet WCAG 2.1 AAA standards.

  • Does the color pair #3498db (foreground) and #2c3e50 (background) pass AA compliance?

  • Run a contrast check for my brand colors: #E74C3C and #ECF0F1.

  • Tell me if #7F8C8D on #FFFFFF is accessible for small text under WCAG 2.1 AA.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect Color Contrast Checker once, then ask.

Click the link to connect the MCP to your client. Your credentials stay encrypted, and you can start checking colors immediately.

Connect Color Contrast Checker to your AI

FAQ

How this task behaves.

  • 01

    Can the AI change my CSS files directly?

    No. The AI only checks the colors you provide. You must manually update your code or design files with the passing colors.

  • 02

    Does it check for color blindness simulation?

    No. This tool specifically checks contrast ratios against WCAG standards, not color vision deficiency simulations.

  • 03

    Can I check multiple colors at once?

    Yes. You can provide a list of foreground and background pairs in a single prompt for the AI to process.

  • 04

    What standards does it use?

    The tool checks against WCAG 2.1 AA and AAA standards.

  • 05

    Does the AI store my design assets?

    No. The AI only processes the specific color values you send in the chat session.

  • More questions about Color Contrast Checker? The Connector page answers them. See everything the Color Contrast Checker Connector can do

Connect colord to Claude, Cursor, ChatGPT & more