Toggle the Color Display Mode option in the Line Format toolbar.
The elements of the sheet format take on this color when you aren't editing the format.
Go to File>Print>Page Setup, and change it from "Color" to "Black & White". This will fix it for printed pages.
Open any drawing. Then go to File>Save As... Select ".PDF" from your filetype options. Now an Options... button will pop up. Press it, and set the PDF export for "export PDFs in color" and make sure it is set off, so it only prints in B&W.
Both of the above items remove the "grayscaled" effect that printing a "color" image to a B&W color creates. With the above options, it will either be full saturation black, or white.