WCAG Color Contrast Visualizer
Professional tool for testing color contrast according to WCAG 2.1. Check accessibility, test gradients, and get AA/AAA certification for your design.
Advanced Color Editor
Support for HEX, RGB, RGBA, HSL, HSLA, and linear gradients. Drag&drop color stops, gradient rotation.
Real-time WCAG Validation
Instant contrast validation with canvas gradient sampling and AA/AAA compliance markers.
Live Preview
See text in 6 variants (3 sizes × 2 weights) with WCAG compliance visualization for each.
Change History
Full undo/redo, CSS export, mobile-friendly collapsible sections. All without server upload.
What is WCAG color contrast?
WCAG (Web Content Accessibility Guidelines) are international standards for web content accessibility. Color contrast is a ratio determining the difference between text and background brightness - crucial for readability and accessibility.
Why does contrast matter?
Accessibility for All
15% of the population has color vision problems. Proper contrast ensures readability for the elderly, visually impaired, and colorblind.
Better SEO
Google Lighthouse includes accessibility in audits. WCAG compliance improves Core Web Vitals scores and search engine ranking.
Legal Requirements
In the EU and USA, digital accessibility is legally required for the public sector and increasingly for private companies (ADA, EAA).
Better Usability
High contrast means better readability for everyone - in sunlight on a phone, on small screens, or with tired eyes.
How to check contrast?
Select Colors
Set text and background colors using the color picker or by entering HEX/RGB/HSL codes. You can also create a linear gradient with multiple colors.
Check WCAG Metrics
The tool automatically calculates the contrast ratio using canvas to sample the gradient and shows compliance with AA and AAA levels.
View Preview and Export
Check text in 6 different variants (sizes and weights) with WCAG markers. Copy CSS or download as a file!
Frequently Asked Questions
Find answers to the most common questions