cmocean
This package contains colormaps for commonly-used oceanographic variables. Most of the colormaps started from matplotlib colormaps, but have now been adjusted using the viscm tool to be perceptually uniform.
https://matplotlib.org/cmocean/
Reference
Thyng, K. M., Greene, C. A., Hetland, R. D., Zimmerle, H. M., & DiMarco, S. F. (2016). True colors of oceanography. Oceanography, 29(3), 10. http://tos.org/oceanography/assets/docs/29-3_thyng.pdf
Similar colormap
plots.cm in Typhoon package
http://www.radiativetransfer.org/misc/typhon/doc/typhon.plots.cm.html
#matplotlib_better_colormap