A browser-based utility that helps users create coordinated color sets by selecting one to four hues and producing five shades per hue, with presets and a freestyle mode for exploration. It uses a traditional RYB color model and offers scheme types from monochromatic to triad and tetrad, plus optional complementary colors.

The tool includes a variety of previews—web layouts, UI mockups, randomly sampled images and a tartan fabric view—so you can evaluate palettes in context. Advanced features include simulation filters for many types of color vision deficiencies and gamma/desaturation previews, as well as WCAG contrast checks for accessibility.

Palettes can be exported in many formats (HTML, CSS, LESS, XML, plain text, PNG, Photoshop ACO and GIMP GPL), and hovering or clicking colors reveals detailed color values (hex, RGB, HSL-like RYB hue, LAB, relative luminosity) for easy translation into design workflows. The project is maintained as a hobby site supported by advertising and optional donations.