We've heard from a few clients now that it would be great to be able to use the extended color palette for the column header, similar to the colour picker on cell color, or conditional formatting.
When choosing a column header color, you currently have 8 color choices.
When choosing a cell colour, you currently have 120 color choices.
To add your support to this feature, click on the 'Me Too!' button to vote it up, and feel free to add any additional thoughts or use cases in the comments.