https://ai.googleblog.com/2019/08/turbo-improved-rainbow-colormap-for.html details a new color map that tries to capture some of the detail you get from jet while mitigating some of the perceptual problems.

Looks like the python implementation is licensed Apache 2.0 with Google as the copyright holder: https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f

Perhaps this or some similar map would be interesting to include?

There were also a few comments on gitter about this.