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Atmos vs Harmonizer: catalog facts
Atmos	Harmonizer
Freemium Free to start; an account login is offered for further use.	Free Free to use in the browser.
Web	Web
Uniform shade and scale generation Semantic status colors from a primary color	Uses OKLCH for perceptually even palettes Keeps contrast consistent across hues
Browser only Some features may need an account	Aimed at UI palettes rather than general color exploration Little documentation visible on the site
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.