print spreadsheet with color coded cells print completely devoid of color

I am making an electronic timsheet I am designing more pleasing to the eye by color coding everything that is locked in a light blue, and everything that the user must fill out in white. After the timesheet has been completed for the pay cycle, it is printed and signed.

Is there anyway to tell the spreadsheet to only show color on the electronic version? That is to say, when it is printed, all cells should be completely devoid of color, as it is printed in B/W on colored paper (blue paper for union employees and pink paper for supervisors). Right now, the shaded cells appear "grey" when I print it in B/W on the colored paper.

Thank you in advance if you are able to help!