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Head-to-head · Color Palette Generators

Fluent UI Theme Designer vs Colorfool

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Fluent UI Theme Designer #3 in Color Palette Generators 8.7/10 Open source ✓ 1 of 5 features Visit site
Colorfool #5 in Color Palette Generators 7.8/10 Free plan Free plan✓ 5 of 5 features Visit Colorfool

Fluent UI Theme Designer leads on 0 checks, Colorfool on 3, and 3 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFluent UI Theme Designer · 8.7/10
  • Free planonly Colorfool
  • Most featuresColorfool · 5 of 5

Fluent UI Theme Designer scores higher on our rubric for color palette generators: 8.7 against 7.8 out of 10; our editors rank them #3 and #5.

On palette methods, Colorfool gives you Both where Fluent UI Theme Designer offers Generate. Colorfool offers image extraction; Fluent UI Theme Designer doesn't. Colorfool offers saved palettes; Fluent UI Theme Designer doesn't. Colorfool offers brand color library; Fluent UI Theme Designer doesn't.

Fluent UI Theme Designer is the better fit for fluent UI developers creating semantic themes. Colorfool is the better fit for brand teams wanting free AI-assisted palette work.

  • Fluent UI Theme Designer fits best

    Fluent UI developers creating semantic themes

  • Colorfool fits best

    Brand teams wanting free AI-assisted palette work

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Fluent UI Theme Designer 8.7/10 Visit ↗ Colorfool 7.8/10 Visit ↗
At a glance
Editor score 8.7 7.8
Ranking #3 in Color Palette Generators #5 in Color Palette Generators
Best for Fluent UI developers creating semantic themes Brand teams wanting free AI-assisted palette work
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business
Features Fluent UI Theme Designer 1/5 · Colorfool 5/5
Image extraction — ✓ (best)
Accessibility checks ✓ ✓
Saved palettes — ✓ (best)
Brand color library — ✓ (best)
Print color support Not checked yet ✓ (best)
Specs
Palette methods Generate Both
Export formats Code, JSON, PowerShell CSS, SCSS, Tailwind, Figma/Tokens, JSON, Sketch, CMYK, PNG, ASE, .sketchpalette, .swatches, .pptx
Our review
Pros
  • Generates Fluent UI palettes and semantic theme slots
  • Previews themed components and checks contrast ratios
  • Exports JavaScript, TypeScript, JSON, PowerShell, and CodePen examples
  • AI-assisted generation with conversational palette refinement
  • WCAG checks, colorblind simulation, and live UI previews
  • Exports for code, design, and print workflows
Cons
  • Does not extract palettes from images
  • Does not save palettes
  • Focused on Fluent UI React rather than general palette generation
  • Web-only access limits native app workflows
  • No separate paid tiers for differentiated controls
  • Teams needing native integrations may prefer another tool
Our verdict

Fluent UI Theme Designer is a browser-based, open-source theming utility for developers and designers working with Microsoft’s Fluent UI React components. It lets users adjust primary, text, and background colors, then inspect the…

Read the review →

Colorfool is a browser-based color toolkit for solo users and teams creating shared brand systems. It supports harmony-aware palette generation, AI-assisted creation and conversational refinement, image and live website color scanning,…

Read the review →
  1. Fluent UI Theme DesignerColor Palette Generators 8.7Open source
  2. ColorfoolColor Palette Generators 7.8Free plan

Strengths and trade-offs

  • Fluent UI Theme Designer — where it wins

    • Generates Fluent UI palettes and semantic theme slots
    • Previews themed components and checks contrast ratios
    • Exports JavaScript, TypeScript, JSON, PowerShell, and CodePen examples

    Where it doesn't

    • Does not extract palettes from images
    • Does not save palettes
    • Focused on Fluent UI React rather than general palette generation

  • Colorfool — where it wins

    • AI-assisted generation with conversational palette refinement
    • WCAG checks, colorblind simulation, and live UI previews
    • Exports for code, design, and print workflows

    Where it doesn't

    • Web-only access limits native app workflows
    • No separate paid tiers for differentiated controls
    • Teams needing native integrations may prefer another tool
  • Fluent UI Theme Designer8.7/10 · Open source

    A focused web tool for building accessible Fluent UI semantic themes.

    Visit siteFull verdict →
  • Colorfool7.8/10 · Free plan

    A free web toolkit for creating, checking, previewing, and exporting brand palettes.

    Visit ColorfoolFull verdict →

More comparisons

All color palette generators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update