/usr/share/themes/MurrinaBleu/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 | active_text_color=#000000
button_offset=0
button_spacing=1
full_width_title=true
inactive_text_color=#808080
inactive_text_shadow_color=#f2f2f2
show_app_icon=true
title_horizontal_offset=0
title_vertical_offset_active=1
title_vertical_offset_inactive=1
|