Variable: inverse-video
inverse-video is a customizable variable defined in dispnew.c.
Value
nil
Documentation
Non-nil means invert the entire frame display.
This means everything is in inverse video which otherwise would not be.
Probably introduced at or before Emacs version 16.
Source Code
// Defined in /usr/src/emacs/src/dispnew.c
DEFVAR_BOOL ("inverse-video", inverse_video,
doc: /* Non-nil means invert the entire frame display.
This means everything is in inverse video which otherwise would not be. */);