.OBT File Extension
File TypeOpenbox Theme File
What is an OBT file?
Theme file used by Openbox, an open source window manager for GNOME and KDE Linux desktop environments; saves settings for window borders, menus, scrollbars, and other visual elements; includes the sizes, colors, fonts, and text styles; used for customizing the window appearance.
Openbox global themes are stored in the /usr/share/theme/ directory. Local user themes are stored either in [user]/.local/share/themes/ or [user]/.themes/.