ColorUI vs Mermaid Viewer

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 Mermaid Viewer
Detail	ColorUI	Mermaid Viewer
What it does	The ultimate color toolkit for designers, decorators, artists, and creators. 40+ free tools, no sign-up, fast on every device.	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Freemium
Pricing	Not given	Free: unlimited editor and preview, 3 saved diagrams, 5 AI uses total, PNG export 1× with watermark. Starter: $6.99/month or $69.90/year; 30 saved diagrams, 500 AI conversations per month, PNG export up to 4× without watermark. Pro: $11.99/month or $119.90/year; unlimited diagrams, unlimited AI, PNG
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	Live preview of Mermaid code as you type AI diagram generator, editor and syntax fixer PNG export on every plan; JPG, SVG and PDF on Pro All 22+ Mermaid diagram types supported Share diagrams via public links and embeds Save diagrams to cloud with folders and version history Keyboard shortcuts and autocomplete Mobile-responsive editor with pan and pinch-zoom
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	No account or sign-up required to start editing diagrams Affordable pricing: Starter at $6.99/month, Pro at $11.99/month Diagrams render in your browser; nothing stored unless you choose to save Fast editor with instant rendering and clear error messages
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	6 +1 (up) since last check
Trust Flow (Majestic)	8	3
Citation Flow (Majestic)	7	23
Referring domains (Majestic)	9	12

4 details filled in for both companies.

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