Bridget Beari Color Rule:
Use Paint to Create Architectural Details
When you lack architectural details in a room, use paint to create them. It is the easiest and cheapest way to create those stopping and starting points in a room.
You can paint in a crown on the wall just below the ceiling to give a visual break between the walls and the ceiling.
Gabriel Hendifar uses a larger band of color below the crown to create a more imitate feel in a room.
You can also use paint to create color blocks mimicking niche spaces when there is only a blank wall.