/usr/share/themes/Bluebird/xfwm4/themerc is in murrine-themes 0.98.8.
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 11 12 13 | # Bluebird xfwm theme by Simon Steinbeiß and Pasi Lallinaho
# based on the Axiom xfwm theme by Rogier Koppejan.
active_text_color=#F1F1F1
button_offset=3
button_spacing=4
full_width_title=true
inactive_text_color=#93ADC9
maximized_offset=2
show_app_icon=false
title_horizontal_offset=0
title_vertical_offset_active=1
title_vertical_offset_inactive=1
|