add viridis color map
In recent year, the notorious rainbow color map has become out of fashion, and for good reasons. MATLAB has replaces their default jet
by parula
(nonfree, https://de.mathworks.com/help/matlab/ref/parula.html), matplotlib now has their viridis default (https://matplotlib.org/devdocs/api/_as_gen/matplotlib.pyplot.viridis.html). An interesting talk describes the creation process of the color map.
viridis should probably be included into ParaView.