I came to know that I have an AlaDelta theme sitting/hiding somewhere on the system. I tried the following approaches -$ apt-file search aladeltawith variations of aladelta in some caps, all caps but no avail. $ aptitude search aladelta Also tried various theme packages which I have installed to see if one of them might have this theme but it's a long slog. [$] dpkg -l | grep -i themeAny ideas how to figure out where this theme might be holed up ?~/.themes is empty. [~/.config/gtk-3.0] - [10106][$] cat settings.ini                                                                                                                [Settings]gtk-theme-name=AlaDeltagtk-icon-theme-name=matefaenzagraygtk-font-name=Sans 12gtk-cursor-theme-name=DMZ-Blackgtk-cursor-theme-size=48gtk-toolbar-style=GTK_TOOLBAR_BOTH_HORIZgtk-toolbar-icon-size=GTK_ICON_SIZE_LARGE_TOOLBARgtk-button-images=1gtk-menu-images=1gtk-enable-event-sounds=0gtk-enable-input-feedback-sounds=0gtk-xft-antialias=1gtk-xft-hinting=1gtk-xft-hintstyle=hintmediumgtk-xft-rgba=nonegtk-application-prefer-dark-theme=1This has become an issue as the theme is supposed to be a fork of adwaita and is obsolete by many years. I came to know about it as it started giving gtk warnings as just have upgraded to gtk-3.20 . 
where is AlaDelta theme hiding and how do I delete/purge/remove it
regular expression;dpkg;theme