Highlight open tab in desktop browser when multiple tabs exist

I always have multiple tabs opened, often as many as 30 or more. When it dark mode, there is no easy way to distinguish which tab is for the page being viewed. There has to be an easy way to highlight the currently open tab among all the tabs. I bounce around a lot and being able to quickly close the correct tab makes my work more efficient, but it is often difficult to determine which tab is open. Thanks!!