/usr/share/themes/Kde/xfwm4/themerc is in xfwm4-themes 4.10.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | full_width_title=true
title_vertical_offset_active=1
title_vertical_offset_inactive=1
title_horizontal_offset=2
button_offset=0
button_spacing=0
button_layout=OT|SHMC
active_border_color=#000000
inactive_border_color=#000000
show_app_icon=true
|