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Data Color Picker vs gencolormap: catalog facts
Data Color Picker	gencolormap
Best for: Analysts and designers choosing colors for charts and dashboards	Best for: Researchers choosing color maps for data visualization
Free Free web tool from Learn UI Design, which also sells design courses.	Free Free software under the MIT License.
Web	Linux, Web, Command line
Palette, single-hue and divergent modes Preview on light or dark backgrounds All 3 strengths for Data Color Picker Palette, single-hue and divergent modes Preview on light or dark backgrounds Copy HEX values or export as SVG	Creates sequential, diverging, and qualitative maps Includes a GUI and scripting-oriented command-line tool All 3 strengths for gencolormap Creates sequential, diverging, and qualitative maps Includes a GUI and scripting-oriented command-line tool Offers a web demo
Limited to eight colors per palette Focused on data visualization rather than general UI palettes	The GUI requires Qt
Web application	Downloadable app, Web application
Not open source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Data Color Picker learnui.design/tools/data-color-picker.html Catalog checked September 24, 2026	Official website Full listing and sources Sources for gencolormap marlam.de/gencolormap Catalog checked October 8, 2026

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