Ruby theme with dark mode

Hey guys, is there any way to have the Ruby theme in dark mode? Or are there any themes that are similar to Ruby (not Casper) but with dark colors?
I’ve seen a couple past topics on here about it but they didn’t receive much attention, hoping for more luck.

Probably way too late for the OP but just in case someone else stumbles across this:

Apologies if the changes are not the right way to achieve the results. I don’t have much experience with Ghost / themes. Seems to achieve the desired results though and the colour variables defined are respected so easy enough to change to using some other colours if you wish to do so.

I also use Ruby theme and I shared my approach to add dark mode support to it here, by also asking a related issue: Comments and subscribe iframes with dark mode

Maybe it can help.