Extract Color Palettes from Images: Theory and Practice
Learn how to extract color palettes from images. Understand color theory, dominant color algorithms, and use online tools or code to generate palettes in HEX, RGB, and HSL.
Jun 17, 2026
Pick any color and instantly generate complementary, analogous, triadic, and tetradic color harmonies.
Indigo
A Color Picker & Harmonies tool helps designers and developers select colors and generate harmonious color schemes based on established color theory principles. By starting with a single base color, the tool automatically calculates complementary, analogous, triadic, and tetradic color relationships — giving you a complete, visually cohesive palette in seconds. It's essential for web design, UI/UX design, branding, and any creative project where color matters.
Colors opposite each other on the color wheel (180° apart). This creates maximum contrast and visual impact. Best for call-to-action buttons, highlights, and elements that need to stand out.
Three colors side by side on the color wheel (30° apart). This creates a harmonious, serene color scheme often found in nature. Ideal for backgrounds, gradients, and overall site themes.
Three colors evenly spaced on the color wheel (120° apart). This offers vibrant contrast while maintaining balance. Great for bold, playful designs with multiple accent colors.
Four colors arranged into two complementary pairs (90° apart). This provides the most variety but requires careful balancing — typically one color is dominant and the others are accents.
HEX (#ff0000) is a hexadecimal representation of RGB. RGB (255, 0, 0) defines color by red, green, and blue light levels. HSL (0°, 100%, 50%) defines color by hue (the color angle on the wheel), saturation (intensity), and lightness (brightness). HSL is often more intuitive for adjusting colors.
Harmonies are calculated by rotating the base color's hue by specific angles on the HSL color wheel: complementary = 180°, analogous = ±30°, triadic = ±120°, tetradic = ±90° and ±180°. Saturation and lightness values are adjusted slightly to ensure visual balance.
Yes. Click the CSS, SCSS, Tailwind, or JSON buttons above the palette to generate code ready for your project. CSS exports as custom properties, SCSS as variables, Tailwind as a config extension, and JSON as a structured palette object.
The color name is an approximate human-readable name (like "Indigo" or "Coral") based on the closest named color in the extended CSS color name set. It's useful for communication and design discussions.
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