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ColorUI vs Chalk

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ColorUI compared with Chalk
DetailColorUI logo ColorUIChalk logo Chalk
What it doesThe ultimate color toolkit for designers, decorators, artists, and creators. 40+ free tools, no sign-up, fast on every device. A native macOS drawing app for quick sketches, screenshot markup, and AI-generated diagrams
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Freemium
PricingNot given Free: $0 forever, includes all drawing tools, unlimited sketches in one folder, copy to clipboard as PNG, and auto-save with local-first storage. Pro: coming soon.
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
  • Instant copy-to-clipboard as PNG
  • No accounts or setup required
  • Local-first storage with auto-save
  • Screenshot annotation with arrows, boxes, text, and freehand tools
  • AI diagram generation via Claude, Cursor, Windsurf, and VS Code
  • Refine diagrams through chat
  • Paste screenshot from clipboard
  • Unlimited sketches in one folder
  • Native macOS performance
  • All drawing tools included in free version
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
  • Export to multiple formats: CSS, Tailwind, SCSS, W3C tokens, Android, iOS
  • Wide-gamut Display P3 and CSS Color Level 4 support
  • Zero-friction design: open, draw, and share in seconds with no setup or accounts
  • Local-first architecture: all sketches stay on your Mac, nothing leaves unless you ask
  • AI integration runs through your own subscription with no proxying of prompts
Community votes00
DR (Domain Rating by Ahrefs)1 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)80
Citation Flow (Majestic)724
Referring domains (Majestic)946

4 details filled in for both companies.

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