Use a percentile based color distribution
The idea of such (new) feature would be to apply a color mapping that would be based on a percentile distribution.
For example, currently we can remap a color preset to a log scale thanks to the available color range. In the present case, we'll need to compute the percentile distribution of a given field and then use the distribution to resample (i.e. quartile) the given preset color distribution.
What we see with the scalar bar with the log scale is a good example of what could be done when respecting the data distribution.