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iWantHue vs Viz Palette: catalog facts
iWantHue	Viz Palette
Best for: Data scientists choosing colors for charts with many categories	Best for: Designers and developers choosing chart colors that stay readable
Free Free to use, with source code on GitHub.	Free Free to use in the browser.
Web	Web
Produces perceptually distinct colors Colorblind-friendly option All 4 strengths for iWantHue Produces perceptually distinct colors Colorblind-friendly option Exports to JSON, CSS and JavaScript in several color spaces Can correct or complete an existing palette	Simulates several color vision deficiencies Flags colors that are hard to distinguish at different sizes All 3 strengths for Viz Palette Simulates several color vision deficiencies Flags colors that are hard to distinguish at different sizes Copies palettes as JavaScript arrays
Aimed at categorical data colors, not brand or UI palettes Colorblind optimisation is slow	Focused on data visualization palettes only Does not generate palettes itself; links to other tools for that
Web application	Web application
Not open source	Not open source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Sources for iWantHue medialab.github.io/iwanthue Catalog checked September 24, 2026	Official website Full listing and sources Sources for Viz Palette projects.susielu.com/viz-palette Catalog checked September 23, 2026

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