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K’uychi vs 0to255: catalog facts
K’uychi	0to255
Best for: Designers and developers building color palettes	Best for: Designers choosing shades and hover colors for interfaces
Free Free and open source under Blue Oak Model License 1.0.0.	Free + paid options Can be tried for free; 0to255 Studio offers sign-up for an account.
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	Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning All 4 strengths for 0to255 Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning Useful for choosing hover colors Runs in the browser with nothing to install
Linux desktop application	Pricing for the Studio version is not clearly stated Needs an internet connection
Downloadable app	Web application
Open source	Not open source
License: BlueOak-1.0.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
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 0to255 0to255.com Catalog checked October 1, 2026

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