Add color names packaged with ProPlot or saved to the
~/.proplot/colorsfolder. ProPlot loads the crowd-sourced XKCD color name database, Crayola crayon color database, and any user input files, then filters them to be “perceptually distinct” in the HCL colorspace. Files must just have one line per color in the format
name : hex. Whitespace is ignored.
This is called on import. Use
show_colorsto generate a table of the resulting colors.