Editing gtk.css, by trial and error. :) I took _Stylish GTK Theme_ (link is upper in the thread), chose **gtk-Dark-Jade.css** as a base, and edited parts of it, looking at the result, until was satisfied. :) CSS is huge and almost not commented. But here is my variant, if you like it. You can compare it with the base and see what was changed. [gtk.css.zip](https://github.com/geany/geany/files/7798782/gtk.css.zip)