The ultimate color toolkit for designers, decorators, artists, and creators. 40+ free tools, no sign-up, fast on every device.
A local-first infinite canvas for visual thinkers
Stage
Not given
Startup
Founded
Not given
2026
Based in
Not given
DE
Pricing model
Free
Freemium
Pricing
Not given
Browser: Free. Native app for iPhone, iPad and Mac: €14.99/$12.99 at launch (regular €19.99/$19.99), one-time purchase across all three devices, no subscription.
Key features
Palette Generator
Color Picker with HEX, RGB, HSL, OKLCH, LAB outputs
Image Color Extractor
WCAG and APCA Contrast Checker
Color Blindness Simulator
CSS Gradient Generator
Design Token Export W3C DTCG
Color Wheel Harmonies
Tailwind Color Palette
Material You Colors
Fully offline with no server required
Real folders on disk and Markdown files
Automatic version history with restore
Sync via user's own cloud folder (iCloud, Dropbox)
Nested folders to any depth
Freehand drawing with pen and color
Magnetic arrows for connecting elements
Full-text search across all folders
Interactive to-do lists on canvas
What makes it different
No sign-ups, no paywalls, runs entirely in browser
Perceptually uniform color math with OKLCH and LAB
Accessibility-first design with inline contrast and CVD simulation
ColorUI
visualOS