Dark Mode for Earlier Versions of MacOS

I have Dark Mode in Mojave on my iMac, but my MacBook Air is old enough that I cannot download Mojave, so cannot use Dark Mode on the OS. Is there any way to enable Dark Mode on DT3 in this earlier OS (Sierra 10.12.6). I am guessing not, but thought I’d ask…

Sorry but no, and there are no plans for it.

Fair enough. Thank you.