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Head-to-head · Color Palette Generators

Fluent UI Theme Designer vs KColor

  • 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
KColor #4 in Color Palette Generators 7.9/10 Free plan Free plan✓ 4 of 5 features Visit KColor

Fluent UI Theme Designer leads on 0 checks, KColor on 2, and 4 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 KColor
  • Most featuresKColor · 4 of 5

Fluent UI Theme Designer scores higher on our rubric for color palette generators: 8.7 against 7.9 out of 10; our editors rank them #3 and #4.

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

Fluent UI Theme Designer is the better fit for fluent UI developers creating semantic themes. KColor is the better fit for developers wanting a free, highly flexible generator.

  • Fluent UI Theme Designer fits best

    Fluent UI developers creating semantic themes

  • KColor fits best

    Developers wanting a free, highly flexible generator

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 ↗ KColor 7.9/10 Visit ↗
At a glance
Editor score 8.7 7.9
Ranking #3 in Color Palette Generators #4 in Color Palette Generators
Best for Fluent UI developers creating semantic themes Developers wanting a free, highly flexible generator
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud Cloud, Browser extension
Platforms Web Web, Chrome extension
Support Community, Docs Email, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features Fluent UI Theme Designer 1/5 · KColor 4/5
Image extraction — ✓ (best)
Accessibility checks ✓ ✓
Saved palettes — ✓ (best)
Brand color library — Not checked yet
Print color support Not checked yet ✓ (best)
Specs
Palette methods Generate Both
Export formats Code, JSON, PowerShell SCSS, CSS, Tailwind, Bootstrap, Radix, JSON, CSV, PNG, SVG, ASE, Hex, OKLCH, HSL, RGB, Display-P3
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
  • Generates palettes from colors, prompts, images, and Google image results
  • Combines WCAG, APCA, and color-vision deficiency checks
  • Exports to code, design tools, and image formats, including Tailwind
Cons
  • Does not extract palettes from images
  • Does not save palettes
  • Focused on Fluent UI React rather than general palette generation
  • Its broad generation toolkit may exceed the needs of simple palette picking
  • The many export formats can add choice to quick, focused workflows
  • Preview and accessibility tools still leave final color decisions to the user
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 →

KColor is a browser-based color palette and design tool for developers, designers, and creators. It generates palettes from base colors, natural-language prompts, uploaded images, and Google image results. Users can also create tints,…

Read the review →
  1. Fluent UI Theme DesignerColor Palette Generators 8.7Open source
  2. KColorColor Palette Generators 7.9Free 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

  • KColor — where it wins

    • Generates palettes from colors, prompts, images, and Google image results
    • Combines WCAG, APCA, and color-vision deficiency checks
    • Exports to code, design tools, and image formats, including Tailwind

    Where it doesn't

    • Its broad generation toolkit may exceed the needs of simple palette picking
    • The many export formats can add choice to quick, focused workflows
    • Preview and accessibility tools still leave final color decisions to the user
  • Fluent UI Theme Designer8.7/10 · Open source

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

    Visit siteFull verdict →
  • KColor7.9/10 · Free plan

    A free, highly flexible palette generator with accessibility checks and developer-ready exports.

    Visit KColorFull 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