By default, the platform does not have this option. You can use the following CSS code to change ribbon color when a user is not enrolled.
Please follow the steps below:
1. Go to BuddyBoss > Theme Options
2. Under Custom Codes, enable CSS
3. Append the following:
.ld-status.ld-status-incomplete.ld-third-background {
background-color: #eeee22;
}
4. Save changes