Font blending with the dark background in dask-labextension tabs

[Vonatzki]

Using this extension alongside dask-labextension will produce fonts in the dask tabs that blends in the dark background, as shown:

[joshdgreen77]

I am getting the same problem for my Seaborn plots as well.

[oriolmirosa]

I don't use the Dask extension so I'm not sure what the issue is, but as far as seaborn or matplotlib, I don't think the issue is with the theme, but with the seaborn/matplotlib defaults. You have two alternatives:

1. Use a dark theme for matplotlib by adding this at the top of your notebook:
   plt.style.use('dark_background')

I'm not a big fan of the results, and since I don't have the desire to create a matplotlib theme myself, I use the second option:

2. Change the facecolor of the matplotlib graphs to white. Again, you can put this at the top of the notebook (if you changed your theme to 'dark_background', you'll have to bring it back to 'default'):
   plt.rcParams['figure.facecolor'] = 'white'

Now the graphs are the same as they would be in a light theme, but the area underneath the labels outside of the axes will be white and the labels will be visible.