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Viz Palette vs Data Color Picker: catalog facts
Viz Palette	Data Color Picker
Free Free to use in the browser.	Free Free web tool from Learn UI Design, which also sells design courses.
Web	Web
Simulates several color vision deficiencies Flags colors that are hard to distinguish at different sizes	Palette, single-hue and divergent modes Preview on light or dark backgrounds
Focused on data visualization palettes only Does not generate palettes itself; links to other tools for that	Limited to eight colors per palette Focused on data visualization rather than general UI palettes
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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