I don't have dark theme turned on but i am using Adwaita and selected items in software center were completely messed up and text was unreadable.
I opened the CSS file as described by others above
Code:
gksudo gedit /usr/share/software-center/ui/gtk3/css/softwarecenter.css
Then under the two @define-color lines added a third line so the first three lines now look like this
Code:
@define-color light-aubergine #DED7DB;
@define-color super-light-aubergine #F4F1F3;
@define-color selected_bg_color #4B97C4;
Now the highlighted background is pretty much the same shade as the Adwaita theme.
Bookmarks