Create a colour palette for reports (not just the Brand Colours)

I’d like to be able to create a colour palette specifically for reports, and set it as the default across the whole account (or business unit).

Some of my clients are happy to use their brand colours (as the report builder allows us to do now). But for others, they may want to:

  1. Use a specific selection of their brand colours, not all of them.
  2. Use 20 different shades of their primary brand colour.
  3. Or simply have reports in black and white.

Adding a report or dashboard colour palette within the brand settings would be a solid solution for this.