Color is fundamental to UI development, design systems, and accessibility compliance. These tools let you pick, convert, contrast-check, and generate color palettes entirely in the browser.
What Is the Color Contrast Checker?
Color Contrast Checker is one of the tools in WebdevToolbox’s Color Tools category. Check WCAG 2.1 AA/AAA color contrast ratios for foreground and background pairs. It runs entirely in your browser — no server uploads, no accounts, no waiting.
How to Use It
- Open Color Contrast Checker.
- Enter your foreground and background colors as HEX, RGB, or HSL.
- The tool calculates the contrast ratio and shows WCAG AA and AAA pass/fail status.
- Adjust colors until you pass the required accessibility level for your text size.
Key Features
- 100% client-side — all processing happens in your browser. Nothing is sent to a server.
- Real-time output — results update as you type, with no submit button required.
- One-click copy — copy the output to your clipboard with a single button press.
- PWA-ready — works offline when installed as a Progressive Web App.
- Multiple color models — HEX, RGB, HSL, HSV, CMYK, and named colors all accepted as input.
When to Use the Color Contrast Checker
- Design systems — generate a complete palette of shades and tints from your brand primary color.
- Accessibility compliance — verify text and background combinations meet WCAG contrast requirements.
- Frontend development — convert design tokens between HEX, RGB, and HSL for CSS custom properties.
Try It Now
Open Color Contrast Checker directly from anywhere on the site using ⌘K and typing the tool name. No login required — everything runs offline-capable in your browser.
Part of the Color Tools collection on WebdevToolbox — free, browser-based developer tools with no login required.