These are MatPlotLib's first three default colours, which have since been used by many other systems as well: https://www.statology.org/matplotlib-default-color

These are MatPlotLib's first three default colours, which have since been used by many other systems as well: https://www.statology.org/matplotlib-default-colors/ https://www.statology.org/matplotlib-default-colors/ If you ask for the things in another order, does it change the colour order, or justify the choices differently?