# Active Window Border If you would like to add a visual border around the currently focused window, ensure the following options are defined in the `komorebi.json` configuration file. ```json { "active_window_border": true, "active_window_border_colours": { "single": { "r": 66, "g": 165, "b": 245 }, "stack": { "r": 256, "g": 165, "b": 66 }, "monocle": { "r": 255, "g": 51, "b": 153 } } } ``` It is important to note that the active window border will only apply to windows managed by `komorebi`. This feature is not considered stable and you may encounter visual artifacts from time to time. [![Watch the tutorial video](https://img.youtube.com/vi/ywiAvoMV_gE/hqdefault.jpg)](https://www.youtube.com/watch?v=ywiAvoMV_gE)