It would be nice if the admin_text field could have either custom or predefined
background colors assigned via parameters, so that admin notices could stand out
a bit more, if desired. For example, with completely custom (background) color:

{content_module module='ECB2' field='admin_text' color="#ABCDEF"}

or with predefined color schemes:

{content_module module='ECB2' field='admin_text' type="alert"}

For predefined color schemes we could have typical UI patterns like “notice”
(light blue), “alert” (yellow), “error” (red), “confirm” (green) and perhaps
“neutral” (light grey).