/usr/share/themes/DarkRoom/index.theme is in human-theme 0.39.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Name=DarkRoom
Type=X-GNOME-Metatheme
Comment=
[X-GNOME-Metatheme]
GtkTheme=DarkRoom
MetacityTheme=DarkRoom
IconTheme=Humanity-Dark
CursorTheme=default
CursorSize=18
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