Allow custom folder colors

I have way to many folders to keep track of when they all blend together with grey text.

Is there ANY way at all to customise the folder styles?

I’d be happy to write the code (css?) to achieve this.
Thunderbird allowed you to alter the CSS, it was a very useful option.

I think the answer you’re looking for is here (which is unfortunately, no)

Yes, should be integrated like other folder options:

  • Moving around
  • Own folder colours/icons
  • Search function for folders like when moving mail to folders