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K’uychi vs ColorBox: catalog facts
K’uychi	ColorBox
Best for: Designers and developers building color palettes	Best for: Designers building color scales for a design system
Free Free and open source under Blue Oak Model License 1.0.0.	Free Free to use in the browser; no paid tier is shown on the page.
Linux	Web
Generates lighter and darker shades from a base color Uses OKLab for perceptual uniformity All 3 strengths for K’uychi Generates lighter and darker shades from a base color Uses OKLab for perceptual uniformity Copies hexadecimal values for use in other tools	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
Linux desktop application	Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration
Downloadable app	Web application
Open source	Not open source
License: BlueOak-1.0.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for K’uychi codeberg.org/nyx_lyb3ra/kuychi Catalog checked October 8, 2026	Official website Full listing and sources Sources for ColorBox colorbox.io Catalog checked September 23, 2026

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