Color Contrast Checker & Generator - 2.1 WCAG Accessibility Tool
Test, compare, and generate accessible color combinations that meet WCAG 2.1 and ADA compliance standards.
Large Text (18pt+)
Normal Text (Regular Size)
Results
Normal Text
Large Text
UI Components
WCAG 2.1 Color Contrast Standards (Quick Reference)
| WCAG Level | Normal Text | Large Text | UI Components |
|---|---|---|---|
| AA | 4.5:1 or higher | 3:1 or higher | 3:1 or higher |
| AAA | 7:1 or higher | 4.5:1 or higher | 3:1 or higher |
These ratios ensure sufficient color differentiation for all users, including those with visual impairments.
How to Use This Website Color Contrast Generator
Use this advanced accessibility tool to test and perfect your color combinations.
Pick or Paste Colors: Enter HEX, RGB, HSL, CMYK, HSV, or LAB values.
Swap Colors: Instantly switch foreground and background.
Convert Formats: See your colors in all six code types.
Randomize Colors: Generate two random colors to explore new accessible combinations.
Fix Contrast: Use the “Adjust Foreground,” “Adjust Background,” or “Adjust Both” options to automatically improve color contrast while staying within the same shade range.
Undo / Redo Colors: Navigate through your recent color changes with the “Undo” and “Redo” buttons, just like a design editor.
Download Preview: Save your contrast-tested colors as an SVG file to use in your design or presentation.
Why This ADA Color Contrast Analyser Matters
Accessibility isn’t just a design trend — it’s a legal and ethical responsibility.
Using this tool helps you:
Build inclusive websites and apps.
Avoid accessibility lawsuits related to ADA non-compliance.
Improve readability and user experience for everyone.
Align with WCAG 2.1 AA and AAA color contrast standards.
Check Color Accessibility Instantly
Ensure your design meets accessibility standards. Use our color contrast checker to test two colors in HEX, RGB, HSL, CMYK, HSV, or LAB formats. Paste or pick colors, swap them, fix contrast ratio in one click or generate random accessible pairs to find the perfect color palette that passes all WCAG 2.1 contrast levels.
Why Use This Web Colour Contrast Checker Ratio?
Color contrast directly impacts how readable, inclusive, and accessible your website or design is.
According to the WCAG 2.1 guidelines, text and interactive elements must maintain sufficient contrast against their background to ensure visibility for users with low vision or color blindness.
Our advanced contrast checker and generator automatically calculates contrast ratios, identifies pass/fail results for WCAG AA and AAA levels, and provides actionable suggestions to help you reach full accessibility compliance.
Combined with automatic contrast fixing, color history navigation, and SVG export, it’s a complete accessibility testing solution for designers, developers, and brands aiming for ADA-compliant color contrast across websites, apps, and digital interfaces.
Frequently Asked Questions (FAQs)
Q1: What is a colour contrast checker?
A colour contrast checker measures the visual difference between two colors (usually text and background) and determines if the combination is readable and accessible according to WCAG 2.1 guidelines.
Q2: What is the required contrast ratio for accessibility?
For normal text, a minimum ratio of 4.5:1 is required to pass WCAG AA. Large text and UI elements need at least 3:1. AAA level requires 7:1 for normal text.
Q3: Can this tool generate color combinations?
Yes! The randomize generarte feature acts as a color contrast generator, creating new pairs automatically that you can test or adjust.
Q4: What are WCAG 2.1 standards?
WCAG (Web Content Accessibility Guidelines) 2.1 defines rules for creating content that’s accessible to users with visual, auditory, cognitive, and motor disabilities. Color contrast is a critical part of those rules.
For normal text, a minimum ratio of 4.5:1 is required to pass WCAG AA. Large text and UI elements need at least 3:1. AAA level requires 7:1 for normal text.
Q5: Does this tool ensure ADA compliance?
It helps you evaluate and achieve ADA-compliant color contrast by testing your color pairs against WCAG 2.1 levels AA and AAA.
Q6: Who should use this color contrast checker tool?
Web designers and developers
UI/UX professionals
Brand managers
Accessibility testers
Digital marketers ensuring ADA compliance
Q7: Can I fix my colors automatically?
Yes. Use the “Fix Contrast” dropdown to automatically adjust foreground, background, or both colors while keeping the same tone. If the ratio still fails after adjusting both, try refining each color separately.
Q8: Can I undo or redo color changes?
Yes. The “Previous Color” and “Next Color” buttons let you revisit earlier color pairs, so you never lose a combination you liked.
Q9: Can I download my color preview?
Absolutely. Once you’ve finalized your color contrast test, download the preview as an SVG file — perfect for documentation or sharing with clients.