A Book of Colors

Browse hundreds of curated palettes, generate your own with color theory or your camera, and copy any hex instantly. Synced across all your Apple devices.

Explore 800+ hand-picked color palettes, build your own with color theory or a photo, and copy any hex with a tap. Everything syncs across iPhone, iPad, and Mac through iCloud.

A Book of Colors is a color palette explorer and generator for designers, developers, artists, and anyone who works with color.

CURATED LIBRARY • 800+ hand-picked palettes in the Starter Kit, organized by mood: warm, cool, vibrant, neutral, and dark • Optional palette packs you can show or hide • Filter by mood, source, and number of colors

CREATE YOUR OWN • Generate from a base color: pick a color, choose a harmony (complementary, analogous, triadic, split-complementary, tetradic, or monochromatic), and get a balanced palette computed in a perceptual color space • Manual builder: choose every color by hand • Photo extraction: pull the dominant colors out of any photo

Edit and remix • Edit any palette in place: drag the color chips to reorder, tap to recolor, add or remove colors up to ten • Edit the full-screen palette directly: press and hold to enter edit mode on the canvas

SHARE & EXPORT • Export any palette as a clean, labeled image with hex and RGB values • Send it anywhere with the share sheet

MADE TO EXPLORE • Swipe up and down to move through palettes • Swipe left and right to change the layout • Tap any color to copy its hex code • Ambient mode: palettes drift and auto-cycle, full screen

SYNCS EVERYWHERE • Saved palettes, photo extractions, generated palettes, and likes sync across every device signed into your iCloud, including source photos • See sync status at a glance and trigger a sync manually any time

Designed and built by Jason Gouliard