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Material Theme Builder vs Leonardo: catalog facts
Material Theme Builder	Leonardo
Best for: Designers and developers theming apps with Material Design 3	Best for: Designers and developers building accessible color systems for interfaces and charts
Free Free to use in the browser.	Free Free to use in the browser, with source published on GitHub.
Web	Web
Builds a full Material Design 3 scheme from one color Official tool from the makers of the design system	Generates swatches from target contrast ratios Adaptive themes make dark mode variants quick All 4 strengths for Leonardo Generates swatches from target contrast ratios Adaptive themes make dark mode variants quick Exports CSS custom properties, Design Tokens and SVG Separate tools for data visualization scales
Only useful for projects following Material Design 3 Little information beyond the tool itself on the page	Aimed at design systems work, more than a simple palette picker needs Contrast-driven approach takes some learning
Web application	Web application
Not open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Material Theme Builder material-foundation.github.io/material-theme-builder Catalog checked September 23, 2026	Official website Full listing and sources Sources for Leonardo leonardocolor.io Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.