Streamline your workflow with our comprehensive collection of professional web development tools. From design utilities to security analyzers - everything you need in one powerful platform.
Color Contrast Checker
Ensure perfect color accessibility for your website. Our advanced color contrast checker helps you create accessible designs that comply with WCAG 2.1 guidelines. Test contrast ratios, simulate color blindness, and get intelligent suggestions for better accessibility – all in real-time.
⚡ Instant Results
Real-time contrast ratio calculation and WCAG compliance
🎨 Smart Suggestions
AI-powered color alternatives for failed tests
👁️ Color Blindness Test
Simulate 8 types of color vision deficiency
📊 Bulk Analysis
Test entire color palettes at once
Text Preview
Color Blindness Simulation
This feature simulates how your selected colors appear to people with different types of color vision deficiency. Click on a simulation type to see how the color contrast changes:
- Normal: Standard color vision without limitations
- Protanopia/Protanomaly: Red-blindness/Red-weakness
- Deuteranopia/Deuteranomaly: Green-blindness/Green-weakness
- Tritanopia/Tritanomaly: Blue-blindness/Blue-weakness
- Achromatopsia: Complete color blindness (grayscale vision only)
The contrast ratio for each simulation is automatically calculated to help you identify accessibility issues.
Smart Color Suggestions
If your colors don't meet WCAG standards, this tool generates intelligent alternatives that offer better contrast while remaining similar to your original colors:
- Each suggestion displays the contrast ratio and WCAG compliance (AA or AAA)
- Simply click on a suggestion to instantly apply it
- Color variations are calculated based on HSL color adjustments
Suggestions appear automatically when the current contrast doesn't meet AAA standards (below 7:1).
Suggestions will appear here when needed.
Bulk Palette Analysis
This tool lets you test multiple colors simultaneously for contrast compliance:
- Enter multiple colors - one per line or comma-separated
- Supported formats: HEX (#ffffff), RGB (rgb(255,255,255)), or HSL (hsl(0,0%,100%))
- Click "Analyze Colors" to test all possible combinations
- The result shows the contrast ratio and WCAG compliance for each combination
This is ideal for checking entire website color schemes or design systems.
How to Use the Color Contrast Checker
Select Your Colors
Choose your foreground (text) and background colors using the color pickers or by entering HEX, RGB, HSV or HSL values manually.
Check Compliance
Instantly see your contrast ratio and WCAG 2.1 AA/AAA compliance status. Green badges indicate passing grades for different text sizes.
Test Accessibility
Use the color blindness simulation to see how your colors appear to users with different types of color vision deficiency.
Get Smart Suggestions
If your colors don't pass accessibility standards, our tool will suggest similar colors that meet WCAG requirements.
Understanding WCAG 2.1 Color Contrast Requirements
Level AA
Level AA is the legal standard for most accessibility compliance requirements including ADA, Section 508, and EN 301 549.
Level AAA
Level AAA provides enhanced accessibility and is recommended for content that serves users with higher accessibility needs.
Large Text Definition
Large text has lower contrast requirements because it's easier to read at larger sizes.
Frequently Asked Questions
What is color contrast and why is it important?
Color contrast is the difference in luminance between foreground and background colors. Good contrast ensures that text is readable for all users, including those with visual impairments, low vision, or color blindness.
What's the difference between WCAG AA and AAA standards?
WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. AAA is more stringent, requiring 7:1 for normal text and 4.5:1 for large text. AA is the legal standard for most compliance requirements.
How accurate is this color contrast checker?
Our tool uses the official WCAG 2.1 contrast calculation formula based on relative luminance. The results are identical to those from other professional accessibility testing tools.
Can I test entire color palettes at once?
Yes! Use our bulk palette analysis feature to test multiple color combinations simultaneously. This is perfect for design systems and brand guideline validation.