How to Check Color Contrast for WCAG Compliance
Test foreground and background color combinations for WCAG 2.1 accessibility compliance. Ensure your text is readable.. This step-by-step guide walks you through the process using LevnTools Contrast Checker, a free browser-based tool that handles everything locally on your device. No software to install, no account to create, and no files uploaded to external servers. Follow these steps to complete the task in under a minute — updated for 2026.
Enter foreground color
Enter the text color as a HEX code, RGB value, or use the color picker. This is the color of the text or element you want to check for readability.
Enter background color
Enter the background color behind the text. The tool calculates the contrast ratio between the two colors and displays it immediately.
Review WCAG results
The tool shows the contrast ratio and whether it passes WCAG AA and AAA standards for normal text (4.5:1 for AA) and large text (3:1 for AA). Green checkmarks indicate passing combinations.
Adjust colors if needed
If the contrast ratio fails, the tool suggests similar colors that would pass. Adjust the foreground or background color until you achieve the desired compliance level.
Pro Tips
- WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18px+ bold or 24px+ regular).
- Dark gray text (#333333) on white is often more comfortable to read than pure black (#000000) while still passing AA.
- Test all color combinations on your site, not just body text — buttons, links, and captions need to pass too.
Common Issues & Fixes
Issue: My brand colors fail the contrast check.
Fix: Use a darker shade for text or a lighter shade for backgrounds. You can keep brand colors for decorative elements that do not carry critical information.
Issue: The tool shows a different ratio than another contrast checker.
Fix: Ensure you are entering the same color values. Some tools include alpha transparency which affects the calculation.
Step-by-Step: How to Check Color Contrast for WCAG Compliance
Complete this task using LevnTools Contrast Checker by following each step below. Every step runs in your browser with zero server interaction.
Step 1: Enter foreground color
Enter the text color as a HEX code, RGB value, or use the color picker. This is the color of the text or element you want to check for readability. Contrast Checker handles this step entirely in your browser, so your color files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 2: Enter background color
Enter the background color behind the text. The tool calculates the contrast ratio between the two colors and displays it immediately. Contrast Checker handles this step entirely in your browser, so your color files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 3: Review WCAG results
The tool shows the contrast ratio and whether it passes WCAG AA and AAA standards for normal text (4.5:1 for AA) and large text (3:1 for AA). Green checkmarks indicate passing combinations. Contrast Checker handles this step entirely in your browser, so your color files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 4: Adjust colors if needed
If the contrast ratio fails, the tool suggests similar colors that would pass. Adjust the foreground or background color until you achieve the desired compliance level. Contrast Checker handles this step entirely in your browser, so your color files remain private throughout. Once this step completes, your result is ready to download and use immediately.
Tips for Better Results with Contrast Checker
Getting the best output from Contrast Checker comes down to a few practical tips. WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18px+ bold or 24px+ regular).. Dark gray text (#333333) on white is often more comfortable to read than pure black (#000000) while still passing AA.. Test all color combinations on your site, not just body text — buttons, links, and captions need to pass too.. Following these recommendations ensures consistent, high-quality results every time you use Contrast Checker.
Common Issues and Fixes
If you run into problems while using Contrast Checker, these are the most common issues and their solutions. Issue: My brand colors fail the contrast check.. Fix: Use a darker shade for text or a lighter shade for backgrounds. You can keep brand colors for decorative elements that do not carry critical information.. Issue: The tool shows a different ratio than another contrast checker.. Fix: Ensure you are entering the same color values. Some tools include alpha transparency which affects the calculation.. If none of these solutions resolve your problem, try clearing your browser cache and reloading Contrast Checker.
Frequently Asked Questions
Open LevnTools Contrast Checker in your browser and follow the 4-step process outlined in this guide. Start by enter foreground color, then the entire process takes under a minute. No account or download is required.
LevnTools Contrast Checker is the best free option for this task because it runs entirely in your browser with no file uploads, no account requirements, and no usage limits. For users who value privacy and cost, it is the top choice in 2026.
Yes, LevnTools Contrast Checker works on mobile browsers including Chrome for Android, Safari for iOS, and Firefox Mobile. The interface adapts to smaller screens, and all processing happens locally on your device regardless of whether you use a phone, tablet, or desktop computer.
No, LevnTools Contrast Checker runs entirely in your web browser. There is nothing to install, no plugins required, and no desktop application to download. Open the tool page, follow the steps in this guide, and download your result. It works on any modern browser across all operating systems.
Yes, using LevnTools Contrast Checker to check color contrast for wcag compliance is completely free. There are no premium features locked behind a paywall, no per-file charges, and no daily usage limits. The tool is and will remain free because all processing happens client-side, eliminating server costs.