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I'm impressed by the other mentioned picker, for HCL this time http://tristen.ca/hcl-picker/ http://tristen.ca/hcl-picker/ This tool is also useful https://vis4.net/palettes/#/9|s|00429d,96ffea,ffffe0|ffffe0,ff005e,93003a|1|1 https://vis4.net/palettes/#/9|s|00429d,96ffea,ffffe0|ffffe0,... I have to mention this fantastic presentation on colormaps https://www.youtube.com/watch?v=xAoljeRJ3lU https://www.youtube.com/watch?v=xAoljeRJ3lU (A Better Default Colormap for Matplotlib, SciPy 2015, Nathaniel Smith and Stéfan van der Walt). It is about perceptually uniform colormaps. https://bids.github.io/colormap/ https://bids.github.io/colormap/