Free Online Color Palette Generator
ToolBox's Color Palette Generator helps designers, developers, and creatives build stunning color schemes in seconds. Generate random palettes, create color harmonies based on color theory (complementary, analogous, triadic, tetradic, split-complementary, and monochromatic), or extract dominant colors directly from any uploaded image — all entirely in your browser with zero uploads to any server.
Color Harmony & Accessibility
Explore every major color harmony type with our interactive harmony builder. Pick any base color and instantly see complementary, analogous, triadic, split-complementary, tetradic, and monochromatic palettes. Our built-in WCAG contrast checker automatically evaluates all pairs of colors in your palette, showing you exact contrast ratios and pass/fail status for AA and AAA standards at both normal and large text sizes — essential for accessible web design.
Export Anywhere
Once you've crafted your perfect palette, export it as CSS custom properties, SCSS variables, Tailwind CSS config, JSON, or SVG. Download high-resolution PNG swatches for presentations and mood boards, or copy shareable URLs to send palettes to teammates. Lock individual colors and regenerate the rest, save favorites locally, and use keyboard shortcuts for rapid exploration. No accounts, no sign-ups, no ads — just fast, free color tools.