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ColorBox vs Eva Colors: catalog facts
ColorBox	Eva Colors
Best for: Designers building color scales for a design system	Best for: Setting up a color palette for a UI design system
Free Free to use in the browser; no paid tier is shown on the page.	Free Free to use in the browser.
Web	Web
Fine control over each channel with easing curves Shows contrast ratios for every step All 3 strengths for ColorBox Fine control over each channel with easing curves Shows contrast ratios for every step Exports to Tailwind CSS, OKLCH and Swift	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
Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration	Very little documentation on the page Generated palettes follow the Eva Design System approach
Web application	Web application
Not open source	Not open source
License not stated	License not stated
No account 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 ColorBox colorbox.io Catalog checked September 23, 2026	Official website Full listing and sources Sources for Eva Colors colors.eva.design Catalog checked October 1, 2026

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