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ColorBrewer vs gencolormap: catalog facts
ColorBrewer	gencolormap
Best for: Cartographers and data analysts choosing colors for maps and charts	Best for: Researchers choosing color maps for data visualization
Free Free to use in the browser.	Free Free software under the MIT License.
Web	Linux, Web, Command line
Filters for colorblind safe, print and photocopy safe schemes Map preview with context layers All 3 strengths for ColorBrewer Filters for colorblind safe, print and photocopy safe schemes Map preview with context layers Exports to ASE, GIMP palette, JavaScript and CSS	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 its curated set of schemes Interface is aimed at cartography rather than general design	The GUI requires Qt
Web application	Downloadable app, Web application
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 ColorBrewer colorbrewer2.org Catalog checked September 23, 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.