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Chroma.js Color Palette Helper vs Viz Palette: catalog facts
Chroma.js Color Palette Helper	Viz Palette
Free Free to use in the browser.	Free Free to use in the browser.
Web	Web
Focuses on perceptually balanced color steps Checks palettes for colorblind safety	Simulates several color vision deficiencies Flags colors that are hard to distinguish at different sizes
Specialised for data visualization rather than UI themes Plain interface with little guidance	Focused on data visualization palettes only Does not generate palettes itself; links to other tools for that
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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