[dwdz]

Matplotlib has some nice colormaps as well:

http://medvis.org/2016/02/23/better-than-the-rainbow-the-mat...

http://bids.github.io/colormap/

[JorgeGT]

A plus is that you can easily import these into many programs (MATLAB, ParaView, QGIS, etc.) thus having a consistent look and feel in your plots.