utility function to interpolate N colors within a colorscale

[nicolaskruchten]

This is the kind of thing that happens all the time: give me 4 colors within Viridis, or give me 5 colors within the firs 50% of Plasma or the 20%-65% range of Magma or whatever

[CarlAndersson]

Is anyone working on this already? I had to implement this for my paper anyhow, so I could open a pull request in a few days if there's interest.

[nicolaskruchten]

We'd be happy to accept a pull request, no one else is working on this as far as I know :)