Compare software

Pinwheel vs ColorBox: catalog facts
Pinwheel	ColorBox
Paid $9 USD plus tax, with a 30-day free trial.	Free Free to use in the browser; no paid tier is shown on the page.
macOS	Web
OKLCH and OKLAB gradients without muddy midpoints Automated contrast testing	Fine control over each channel with easing curves Shows contrast ratios for every step
macOS 15 or later only Paid after the trial	Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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