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ColorBox vs Pinwheel: catalog facts
ColorBox	Pinwheel
Free Free to use in the browser; no paid tier is shown on the page.	Paid $9 USD plus tax, with a 30-day free trial.
Web	macOS
Fine control over each channel with easing curves Shows contrast ratios for every step	OKLCH and OKLAB gradients without muddy midpoints Automated contrast testing
Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration	macOS 15 or later only Paid after the trial
Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	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.