Free Online Color Tools
Pick colors from images, convert between formats, check contrast for accessibility, and generate harmonious palettes — all free, no signup, runs in your browser.
Picker
Color Picker
Upload an image and click to extract HEX, RGB, and HSL color codes.
Converter
Color Converter
Convert colors between HEX, RGB, and HSL instantly.
Checker
Contrast Checker
Check color contrast ratios against WCAG AA and AAA standards.
Generator
Palette Generator
Generate harmonious color palettes from any base color.
Pick, Convert, Check, Generate
ColourPicker.app is a complete color workflow for designers and developers. Start with the Color Picker From Image to extract exact color codes from any photo or screenshot. Then use the Color Converter to switch between HEX, RGB, and HSL in one click.
Once you have your colors, run them through the Contrast Checker to verify WCAG AA and AAA accessibility compliance. And when you need a full color scheme, the Palette Generator creates harmonious palettes from any base color using complementary, analogous, triadic, and other harmony rules.
- Pick any color from a photo, screenshot, or design file — pixel accurate
- Convert instantly between HEX, RGB, and HSL
- Check color contrast against WCAG AA and AAA standards
- Generate harmonious palettes using color theory
- Copy CSS-ready values with one click
- No install, no account, no cookies
Built for Speed and Simplicity
Each tool is designed to be immediately useful — open it, use it, copy the result. All processing happens locally in your browser, so your images and data never leave your device.
Frequently Asked Questions
- What is ColourPicker.app?
- ColourPicker.app is a free suite of online color tools for designers and developers. You can pick colors from images, convert between color formats, check contrast for accessibility, and generate harmonious color palettes — all without signing up.
- What tools are available?
- The suite includes four tools that cover the full color workflow: Color Picker From Image (extract exact color codes from any photo or screenshot), Color Converter (convert between HEX, RGB, and HSL), Contrast Checker (verify WCAG AA and AAA color contrast), and Palette Generator (create harmonious color palettes from any base color).
- Is this free?
- Yes. All tools on ColourPicker.app are completely free to use, with no account required.
- Do my images get uploaded or stored?
- No. All image processing happens locally in your browser. Nothing is uploaded or stored on any server.
- Does it work on mobile?
- Yes. All tools work on both desktop and mobile browsers.