src/vs/workbench/services/themes/electron-sandbox/nativeHostColorSchemeService.ts/NativeHostColorSchemeService/registerListeners
class NativeHostColorSchemeService:	private registerListeners(): void {

		// Color Scheme
		this._register(this.nativeHostService.onDidChangeColorScheme(({ highContrast, dark }) => {
			this.dark = dark;
			this.highContrast = highContrast;
			this._onDidChangeColorScheme.fire();
		}));
	}