How to differentiate Office in remote machine by color?

My Windows PC has blue accent color of application window titles, my remote PC has red. When frequently switching between them, I can easily tell them apart by their red or blue windows title bars.

However, if I open Microsoft Office apps on both PCs, they do not seem to draw a single window detail by the accent color of given computer. I see Excel running in each PC and they have exactly the same color. (If I change their theme in Options, both computers change the theme, because theme setting is synced via Microsoft account.)

Similar to distinguishable accent color shown on ordinary windows, can Office apps (connected to the same user account) be made appearing with different colors on each computer?