Magma palette by Nathaniel J. Smith and Stefan van der Walt.
Source: https://github.com/BIDS/colormap/blob/master/colormaps.py
The authors dedicate the palettes to the public domain under CC0 1.0:
https://creativecommons.org/publicdomain/zero/1.0/

magma.rgb contains the 256 matplotlib magma entries, rounded to RGB8.
