/usr/share/themes/Box1/gtk-3.0/settings.ini is in lubuntu-artwork-12-10 0.45.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [Settings]
gtk-color-scheme = "base_color:#f7f7f7\nbg_color:#dcdcdc\ntooltip_bg_color:#666666\nselected_bg_color:#a2b8ca\ntext_color:#2c2c2c\nfg_color:#2c2c2c\ntooltip_fg_color:#ffffff\nselected_fg_color:#F5F5F5\nlink_color:#5590CC\nbg_color_dark:#c9c9c9\nfg_color_dark:#2c2c2c"
gtk-auto-mnemonics = 1
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