Support workspace projects / folders under different colors in sidebar and tabs

[RobertoMalatesta]

• VSCode Version: Nightly
• OS Version: Any

Workspace feature is really useful as it is today, but could themes API be extended so to display different projects with different colors/nuances?

See:

It would be even better if tabs could have different colors, to resemble the project they belong to:

Thanks for all the beautiful code and the effort you put in this superb project.

Roberto.

[johnbrett]

I think this would be an awesome addition - one additional request I would have on this is that we could set colours, or underline to highlight a project's root, as when you have many they are hard to distinguish which is root at a glance, something like:

If this would be possible, I would be happy to work on a PR for this if someone could give me pointers!