/usr/share/icons/HighContrastInverse/index.theme is in gnome-accessibility-themes 3.4.2-2.1.
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 | [Icon Theme]
Name=HighContrastInverse
Comment=High Contrast Inverse Theme
Directories=48x48/stock
Inherits=gnome
[48x48/stock]
Size=48
Context=Stock
Type=Scalable
|