Non-Component Sections For At a Glance File Org

I’d like to suggest an ability org a single file graphically via boxes/background colors.

The problem I’d like to solve is how to communicate, at a glance, within a single file, to team members what each grouping is (Last iteration, Design reference/feedback/info)

There are some tools currently that could be used to serve this purpose, but their other uses complicate or confuse this communication.

Thank you for your time and consideration!