Drupal 8 Get Themenpfad
$themeHandler = \Drupal::service('theme_handler');
$themePath = $themeHandler->getTheme($themeHandler->getDefault())->getPath();
Gleaming Gannet
$themeHandler = \Drupal::service('theme_handler');
$themePath = $themeHandler->getTheme($themeHandler->getDefault())->getPath();<img src="{{ base_path ~ directory }}/images/logo.png" alt="My Logo" />