/usr/share/themes/TraditionalOk/xfwm4/themerc is in mate-themes 3.22.16-4ubuntu1.
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 14 | # Clearlooks XFWM4 by Casey Kirsle
show_app_icon=true
active_text_color=#FFFFFF
inactive_text_color=#939393
title_shadow_active=frame
title_shadow_inactive=false
button_layout=O|HMC
button_offset=2
button_spacing=2
full_width_title=true
maximized_offset=0
title_vertical_offset_active=1
title_vertical_offset_inactive=1
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