Usage: swaybg <options...>

  -c, --color RRGGBB     Set the background color.
  -h, --help             Show help message and quit.
  -i, --image <path>     Set the image to display.
  -m, --mode <mode>      Set the mode to use for the image.
  -o, --output <name>    Set the output to operate on or * for all.
  -v, --version          Show the version number and quit.

Background Modes:
  stretch, fit, fill, center, tile, or solid_color