When a course is hidden from students, we display an indicator in the course tile in My courses page, which is currently in blue background with white text.

However, there is no indicator of such status within the course itself, so in MDL-77184, a 'Hidden from students' badge will be displayed below the course title to inform users about the course visibility status.

These labels/badges should share the same style to keep consistency across all the areas where are displayed, and hence the badge in My courses page should be styled with yellow background and black text to match the ones that are currently displayed for hidden and stealth activities within a course.