I didn't think of styling before so i'd say this needs to be implemented.
I will try to look into this in few weeks if nothing unexpected comes out.

Thanks a ton for looking at that. Right now the buttons stick out like a sore thumb.:-)

+1 on the theming - I'm using arc so the adwaita style buttons look a bit odd!
Thanks for this applet - it would be great if solus could add it by default

I've installed the newest version, and it still doesn't use theme styles properly. I'm using Adapta theme and it's using the fallback icons (and seems to ignore other theming).

Ubuntu Budgie 18.04 here. Since a recent update of Budgie Desktop, buttons in pixel-saver have lost their colors ( close button used to have a red background ). I'm using Adapta theme.
And I think it also has changed in Pocillo theme, it seems buttons have now a different background ( square ) and no color ( in window title bar, Pocillo shows a circle and colored background for buttons ).