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Eva Colors vs Leonardo: catalog facts
Eva Colors	Leonardo
Best for: Setting up a color palette for a UI design system	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
Generates a full palette rather than single colors Runs in the browser with nothing to install All 3 strengths for Eva Colors Generates a full palette rather than single colors Runs in the browser with nothing to install Tied to an existing 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
Very little documentation on the page Generated palettes follow the Eva Design System approach	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 Eva Colors colors.eva.design Catalog checked October 1, 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.