In notification messages sent to the users, you may want to want to have a catchy message with colorful fonts and graphics in it.
Indeed this is possible as some HTML can be used, however, it is rendered and displayed as expected does depend on the mail handler, as they do not all support the same use of HTML. Adding inline styles to set colors or adding an image should work without any issue.
In the Body field, you can just add HTML code. We recommend previewing the Notification to make sure it's being displayed as expected (smart tags will not be populated when previewing, but remain as text. i.e. {course_name})
The above example also demonstrates how you could add a blue color to your text, as well as add a logo in the email's body.
Just keep in mind that this has to be done on the second (or later) line of the Body area, as the first line is going to populate the email's subject.