Define a single color scale with min and max and use it to compare multiple datasets

## Problem description - comparing two datasets with different ranges
I have two datasets of temperatures that I would like to compare. Some of the measurements are unrealistic outliers that are not interesting to the investigation. As it can be seen the histograms of the dataset are quite different and since the color scale is automatically derived from the min-max values it is not directly comparable. Furthermore, I was forced to add fake measurements of extreme values so I could use the histogram to restrict the values to the same domain and hence force the color scales to be comparable.

## Solution
It would be really nice to define a color scale by pallette, min, max values, tics, etc, and then use the same color scale on each dataset.

Currently, I have been forced to include fake extreme values in the dataset, so they are both defined on the same range and then use the histogram to set the same range. It works (sort-of), but it quite time-consuming and would be much nicer with being able to define shared color scales manually.

## Alternative solution
If a shared color scale is not possible then the ability to define the color scale on each dataset with min-max values, ticks and palette would be a good start.