Colors+ is a modern color encyclopedia and creative toolkit for designers, developers, and anyone working with color. It brings together more than 700 named colors, with meanings, HEX and CSS codes, color harmonies, and pairing ideas. Users can browse by hue, explore curated palettes, discover color stories, and learn through practical guides on color formats, accessible combinations, and website palettes. The site also highlights cultural associations and a monthly featured color.

Colors+ offers tools for building and applying color systems. Its palette generator creates complementary, analogous, triadic, and tetradic harmonies, while the contrast checker calculates WCAG ratios to support readable interfaces. Users can extract palettes from uploaded images, convert colors between HEX, RGB, HSL, OKLCH, and CMYK, and create gradients with production-ready CSS code. Additional resources include palette collections for digital products and design, articles about individual colors, and educational content for print and screen. Colors+ also publishes a monthly email featuring fresh palettes, its Color of the Month, and new tools.