Compare software

ColorBoxK’uychi
Free

Free to use in the browser; no paid tier is shown on the page.

 Free

Free and open source under Blue Oak Model License 1.0.0.

Web Linux
  • Fine control over each channel with easing curves
  • Shows contrast ratios for every step
  • Generates lighter and darker shades from a base color
  • Uses OKLab for perceptual uniformity
  • Curve-based controls take some learning
  • Aimed at systematic scales rather than quick inspiration
  • Linux desktop application
Web application Downloadable app
Closed source Open source
License not stated License: BlueOak-1.0.0
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked October 8, 2026

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