Color Accessibility Checker

Check color contrast ratios for WCAG compliance

Key Facts

Category: Design
Input Types: color
Output Type: json
Sample Coverage: 1
API Ready: Yes

Overview

The Color Accessibility Checker is a professional utility designed to verify if your chosen foreground and background color combinations meet WCAG contrast ratio standards, ensuring your digital content is readable for all users.

When to Use

•During the UI design phase to validate color palettes for web or mobile applications.
•When auditing existing websites to ensure text remains legible against background elements.
•Before finalizing brand guidelines to confirm that color pairings comply with accessibility requirements.

How It Works

•Enter the hex code for your foreground (text) color.
•Enter the hex code for your background color.
•Click the check button to calculate the contrast ratio and receive an immediate pass or fail status based on WCAG guidelines.

Use Cases

Validating button text colors against brand-colored backgrounds.

Ensuring body text readability on light or dark mode interfaces.

Checking accessibility of status labels and badges in dashboard designs.

Examples

1. Validating UI Button Contrast

UI Designer

Background: Designing a call-to-action button with a specific brand blue background and white text.
Problem: Need to confirm if the white text is legible enough on the brand blue background to meet accessibility standards.
How to Use: Input the brand blue hex code into the background field and white (#FFFFFF) into the foreground field.
Outcome: The tool confirms a high contrast ratio, ensuring the button is accessible for all users.

2. Checking Body Text Readability

Web Developer

Background: Implementing a new dark mode theme for a blog using a dark gray background.
Problem: Unsure if the chosen light gray text provides enough contrast against the dark background.
How to Use: Input the dark gray background hex and the light gray text hex to verify the ratio.
Outcome: The tool identifies that the contrast is too low, prompting an adjustment to a lighter text shade for better compliance.

Try with Samples

design

Color Code Samples

Collection of color codes in various formats (Hex, RGB, HSL, named colors) for validation testing

title token color

sample

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FAQ

What is the minimum contrast ratio required by WCAG?

For normal text, WCAG AA requires a contrast ratio of at least 4.5:1, while AAA requires 7:1.

Does this tool support transparency or alpha channels?

This tool currently supports standard solid hex color codes.

Why is color contrast important for accessibility?

Proper contrast ensures that users with low vision or color blindness can distinguish text from the background, preventing eye strain and improving readability.

What does the result indicate?

The result provides the calculated contrast ratio and indicates whether the combination meets AA or AAA compliance levels.

Can I check multiple color pairs at once?

This tool is designed to check one specific foreground and background pair at a time for precise validation.

API Documentation

Request Endpoint

POST /en/api/tools/color-accessibility-checker

Request Parameters

Parameter Name	Type	Required	Description
foreground	color	Yes	-
background	color	Yes	-

Response Format

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

JSON Data: JSON Data

AI MCP Documentation

Add this tool to your MCP server configuration:

{
  "mcpServers": {
    "elysiatools-color-accessibility-checker": {
      "name": "color-accessibility-checker",
      "description": "Check color contrast ratios for WCAG compliance",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=color-accessibility-checker",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]

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