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gencolormap vs Data Color Picker: catalog facts
gencolormap	Data Color Picker
Best for: Researchers choosing color maps for data visualization	Best for: Analysts and designers choosing colors for charts and dashboards
Free Free software under the MIT License.	Free Free web tool from Learn UI Design, which also sells design courses.
Linux, Web, Command line	Web
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	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
The GUI requires Qt	Limited to eight colors per palette Focused on data visualization rather than general UI palettes
Downloadable app, Web application	Web application
Open source	Not open source
License: MIT	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for gencolormap marlam.de/gencolormap Catalog checked October 8, 2026	Official website Full listing and sources Sources for Data Color Picker learnui.design/tools/data-color-picker.html Catalog checked September 24, 2026

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