https://github.com/dstansby/napari-matplotlib/pull/26 gave the widget plots styling that works well with napari. Some slight improvements that could be made to this are:

• Changing the figure and axes color to be transparent. I think currently the napari background colour is hard coded, but having a transparent background is more flexible if e.g. napari change their colour.
• Move the settings to a custom matplotlib rc file, and then loading that file. See https://matplotlib.org/stable/tutorials/introductory/customizing.html#the-matplotlibrc-file for how this can be done