/usr/share/themes/Breeze-Dark/gtk-2.0/ is in gtk3-engines-breeze 5.8.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/themes/Breeze-Dark/gtk-2.0/gtkrc
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/buttons
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/default
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/entry
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/menu
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/misc
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/notebook
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/progressbar
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/range
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/scrollbar
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/styles
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/toolbar