Contrast checking ensures that your content is legible for everyone, regardless of their vision capabilities. Test your combinations against WCAG standards in real-time.
The standard level of accessibility. Requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text.
The highest level of accessibility. Requires a ratio of 7:1 for normal text and 4.5:1 for large text. Best for maximum readability.
Refers to standard body text usually smaller than 18pt (roughly 24px) or bold text smaller than 14pt (roughly 18.5px).
Includes headlines and large fonts. Generally 18pt+ (24px+) or 14pt+ (18.5px+) if the text is bold.
See how creators are using Color Contrast Checker in their workflows.
READ THE FULL GUIDE1. WHAT IS THE COLOR CONTRAST CHECKER? The Color Contrast Checker is an essential accessibility utility designed for web developers, UI/UX designers, and digital creators. It instantly calculates the exact contrast ratio between any foreground (text) color and background color, mathematically testing them against the official Web Content Accessibility Guidelines (WCAG). This ensures your websites, apps, and digital graphics are legible for visually impaired users and legally compliant with modern web accessibility standards. 2. WHY YOU NEED THIS (KEY BENEFITS) • WCAG Compliance Check: Instantly verifies if your color combinations pass AA (minimum) or AAA (enhanced) standards for both normal and large text sizes. • Real-Time Visual Feedback: Instead of just giving you a number, the tool updates a live preview box showing exactly what your text and buttons will look like over the background. • One-Click Ghost View: Quickly tests how secondary or "Ghost" buttons (transparent with colored borders) will render against your chosen backdrop. • Export Proof of Compliance: You can download a high-resolution PNG scorecard of your results. This is incredibly useful for designers who need to prove accessibility compliance to clients or project managers during the mockup phase. 3. WHO IS THIS BUILT FOR? • UI/UX Designers: Test brand color palettes before implementing them into Figma or Adobe XD mockups to ensure the designs are actually usable. • Front-End Developers & Web Masters: Verify that the website builds and custom CSS styles comply with legal accessibility standards (important for government, medical, and corporate websites). • Brand Identity Strategists: Ensure that the primary and secondary colors in a new company's brand guideline document can actually be layered on top of each other legibly. • Graphic Designers & Video Editors: Check if lower-thirds, subtitles, or infographic text colors have enough contrast to be readable on mobile screens. 4. COMPONENT & FEATURE BREAKDOWN A. Color Setup • Foreground (Text): The color of the typography or UI element. Use the built-in native color picker, or paste an exact HEX code. • Background: The color of the canvas sitting behind the text. • Swap Tool: A quick-toggle button that instantly flips your foreground and background colors to test inverted layouts (e.g., testing Dark Mode vs Light Mode). B. Quick Presets • One-Click Palettes: Instantly load highly optimized combinations (White/Black, Black/Green, Classic Blue/Gold, White/Red) to use as a baseline or to quickly generate accessible color pairing ideas. C. Ratio Display & Scorecards • Live Ratio Value: A mathematical output (e.g., 4.5:1) representing the luminance difference between the two colors. • AA & AAA Badges: Four distinct score badges that actively turn green (PASS) or red (FAIL) based on the WCAG threshold limits for standard body text and large headline text. D. Live Preview Box • Interactive Canvas: Displays a large headline, body paragraph, solid button, and ghost button using your exact color choices so you can "feel" the readability rather than just trusting the math. E. Export Result • Download Preview (PNG): Wraps your scorecards, ratio math, and live preview into a beautiful, high-resolution PNG image file, instantly downloaded to your computer. 5. STEP-BY-STEP WORKFLOW GUIDE Step 1: Input Your Brand Colors Go to the "Color Setup" section. Paste your brand's primary text color into the Foreground HEX box, and your website's background color into the Background HEX box. Step 2: Check the Math Look at the "Contrast Ratio" panel. If the badges turn Red (FAIL), your colors are too similar in brightness. Step 3: Adjust and Tweak If your score fails, click the native color picker circle. Slowly drag the slider to make the background slightly darker, or the foreground slightly lighter, until the badges flip to Green (PASS). Step 4: Export Documentation Click "Download Preview (PNG)" to save a screenshot of your passing score. You can attach this image to your web design handoff files to prove the colors are accessible. 6. PRO-TIPS & LIMITATIONS • The 4.5:1 Rule: For normal paragraph text (14pt-18pt), you must hit a 4.5:1 ratio to be legally compliant in many sectors. However, for large, bold headlines (18pt+), you only need a 3.0:1 ratio! • Ghost Buttons: Ghost buttons (text and borders only) are notoriously hard to read. Use the live preview box to ensure your ghost button borders don't vanish into the background. • WCAG AAA: Hitting AAA (7.0:1) is the gold standard for accessibility, but it severely limits your color choices. For most commercial projects, passing AA is considered highly acceptable.
