Story: As a user I need to know which elements belong together.

Steps to reproduce:
Click "add" for adding a statement to a property.

What happens:

The bar with »+add«-Statement is gray, while the rest of the Statment-Box is blue.

What (probably) should happen instead

The bar is in the same blue as the left-hand area indicating that a click on add would add another statement about the property it shares the same background with.