I would like the ability to configure (or override the default selected) colors for charts. Several times now we have run into cases where there doesn't appear to be significant contrast between the colors selected for me.

In the attached examples, note that it is somewhat easy to distinguish the different items being represented in the pie chart (also likely because of the nearby labels), whereas in the line charts the similar shades make it harder to tell at a glance what is being represented. By having the ability override the default selection colors, I have the option to both improve contrast between the items being represented - and potentially also to ensure consistency between charts showing similar types of data.