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ColorBox vs Color Studio: catalog facts
ColorBox	Color Studio
Free Free to use in the browser; no paid tier is shown on the page.	Free Free and open source under the Apache 2.0 licence.
Web	macOS
Fine control over each channel with easing curves Shows contrast ratios for every step	Focuses on coherent palettes rather than single colors Considers accessibility when building themes
Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration	No formal releases published on GitHub Small project maintained by one developer
Web application	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
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 Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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