Printing Black and White
Most printers should be able to print color documents in black and white. It should just be a setting on your computer. On a Windows computer for instance if you go to Printers and Scanners, Printing Preferences and choose Black and White.
https://smallbusiness.chron.com/configure-color-printer-default-black-white-47987.html
You can also choose to print to black and white if you're using Adobe Reader to open the PDFs:
https://helpx.adobe.com/acrobat/kb/print-black-white-acrobat-reader.html
If you're printing directly from Chrome, you can choose Black and White for the color option.
Let me know if that helps or if you have any other questions.