When you print a Layout you can either choose to use the Printing Pen Sets provided to get grayscales & colours as the Pen Set has been designed to do.
This means that those light shades are grey but the orange windows become solid black. While the red Revisions pen stays red:
Alternatively you can set the Drawing to print as per Pen Set, Greyscale or Black & White:
However these loose the sensitivity of the printing pen sets like walls fill being grey rather than solid black for example.
You can read up more about the printing pen sets in page 32 of the ArchiCAD 18 NZE Template document