Extract Colors from Image URL - Online Palette Generator

An image color palette generator is a tool that analyzes an image and extracts its most dominant or representative colors. It uses color quantization algorithms like Median Cut to identify the key colors that make up an image's visual identity. Designers use these palettes for brand inspiration, UI design, and creating cohesive visual content.

This tool uses the Median Cut algorithm, a classic color quantization technique. It works by treating all pixels in the image as points in a 3D RGB color space. The algorithm repeatedly finds the color channel with the widest range and splits the pixel group at the median value of that channel. This process continues until the desired number of color groups is reached, and the average color of each group becomes an extracted palette color. For performance, images are intelligently downscaled before processing.

The tool supports HEX (e.g., #FF5733), RGB (e.g., rgb(255, 87, 51)), and HSL (e.g., hsl(9, 100%, 60%)) formats. You can switch between formats using the toggle buttons, and clicking any color swatch copies its code to your clipboard in the selected format. You can also copy all colors at once or export them as CSS custom properties (variables) for direct use in stylesheets.

Due to browser security policies (CORS - Cross-Origin Resource Sharing), some image URLs cannot be processed via the canvas API. If the image server doesn't include appropriate Access-Control-Allow-Origin headers, the browser blocks pixel data access. In such cases, we recommend downloading the image and using the Upload tab instead, which bypasses CORS restrictions entirely. All processing happens locally in your browser — no images are ever uploaded to any server.

You can extract anywhere from 4 to 20 dominant colors using the slider control. The default is 8 colors, which works well for most images. For complex photographs with many color variations, extracting 12-16 colors can capture more nuance. For simple graphics or logos, 4-6 colors usually suffice. The slider adjusts in steps of 2 for convenience.

Absolutely. All image processing is performed entirely client-side in your browser using the HTML5 Canvas API and JavaScript. Your images are never uploaded to any server, transmitted over the network, or stored anywhere. Even when you paste an image URL, the image is fetched directly by your browser — our tool simply reads the pixel data locally. You can use this tool with complete confidence, even with sensitive or private images.

Color palette extraction is widely used in web design, graphic design, branding, and UI/UX. Common use cases include: creating a brand color scheme from a logo or hero image, generating harmonious UI color tokens, analyzing competitor visual branding, extracting mood board palettes from photography, and ensuring accessibility by checking color contrast ratios. Interior designers also use such tools to derive room color schemes from inspiration photos.