I have updated ColorMapToLUT_JSON to support choosing a colormap by name e.g. from ParaView Default Colormaps. In this case you can look at the colormaps in ParaView and select the the one you want from the from the ParaView JSON file.
Two new programs have been added:
These allow you to adjust a colormap so that the colormap scalar range matches the scalar range of the object by rescaling the control points and, optionally, reversing the order of the colors.