Darken tab titles when Orion's window is inactive

I would like Orion to mimic Safari's behavior of darkening the tab titles on an inactive window.

Here are a few comparisons between Safari and Orion.

(active tab on an active window, Safari on top, Orion on bottom)

(active tab on an inactive window, Safari on top, Orion on bottom)

(inactive tab on an active window, Safari on top, Orion on bottom)

(inactive tab on an inactive window, Safari on top, Orion on bottom)