src/vs/workbench/services/themes/browser/browserHostColorSchemeService.ts/BrowserHostColorSchemeService/registerListeners
class BrowserHostColorSchemeService:	private registerListeners(): void {

		addMatchMediaChangeListener('(prefers-color-scheme: dark)', () => {
			this._onDidSchemeChangeEvent.fire();
		});
		addMatchMediaChangeListener('(forced-colors: active)', () => {
			this._onDidSchemeChangeEvent.fire();
		});
	}