ThemeService is an Angular Factory in the Util module with the name theme.js. It provides an API to programmatically get and set the theme (color scheme) and to add theme listeners. To use these functions, see the documentation on injecting Angular services.
The ONOS GUI currently has two themes that can be toggled between by pressing the T key on any view.
The Light Theme on the Topology View:
The Dark Theme on the Topology View:
