Is it possible to change theme or title tab color based on the note or folder I am in?

Plugins ideas
1

This will help with identifying the note or folder when multiple tabs are open. At least a different color in the tab title would be nice.

2

Already answered here.

Is there a way to color the tabs? - Help - Obsidian Forum

3

You could try the Contextual Typography plugin, but I’m not sure if it affects things outside the note body.

4

Interesting plugin but it can’t change the color of the tabs, I think.