### Description As @tgaskin brought up, it would be nice to be able to define a custom colormap by specifying discrete colors between which the colors are interpolated. The [LinearSegmentedColormap](https://matplotlib.org/stable/api/_as_gen/matplotlib.colors.LinearSegmentedColormap.html#matplotlib.colors.LinearSegmentedColormap) allows for that. Currently the `ColorManager` only supports the `ListedColormap` for truly discrete colormaps. ### Proposal Allow to define any `matplotlib.colors.Colormap` via the `ColorManager`. ### How to test the implementation? Extend existing tests.