This colormap is inspired by the colorbar used to display activation times in ex vivo heart activation patterns, as originally presented in the seminal study by:

Durrer, D., Van Dam, R. T., Freud, G. E., Janse, M. J., Meijler, F. L., & Arzbaecher, R. C. (1970). 
Total excitation of the isolated human heart. Circulation, 41(6), 899–912.

The JSON file in this repository can be imported into ParaView, producing a visualization similar to the example shown below: