Flocon de toile | Freelance Drupal: Automatically integrate email via CSS styles with Drupal 8

How do you put colors in your emails sent from your Drupal 8 site? Very often, integrating emails from a Drupal 8 site, or from any website, can be (very) time consuming, with strong constraints in terms of email rendering to have a correct rendering on all types of email or webmails. Discover how to automatically integrate email via CSS styles with Drupal 8.