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

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.

Already answered here.

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

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

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