Hover UI element to reveal its corresponding theme attribute

It'd be cool if I could Alt+Hover a symbol in code or any piece of the UI and see which theme attribute I need to change. This way I can easily get to the colors I want changed directly in the UI rather than trying to search and narrow it down by name. This could only be visible too by holding a set keybind down while hovering like Alt or Shift, keeping it out of the way for normal use.

For example, hovering the text in a tab or something like the div tag here: