Help with highlighting cell colour based on the conditions (# of days) of another cell

Hello,

I have been trying to work on this with conditional formatting for a couple of days now to no avail

Here is a photo of the chart I'm working with:

SampleSheet.jpg

I have made it so that every time a "FILE NUMBER" is entered the cell to the right in grey shows the date it was entered in dd-Mmm-yy (ex. file number is C8 date is entered in D8).

Now what I need is a macro or conditional formatting that will highlight the "Motion" (B, E...) and "FILE NUMBER" (C, F...) cells in red when 10 ***business/work days have passed from the initial date entered in the corresponding grey cell (D, G, J...).

I wanted to use WORKDAY, but the cells are filled at random dates so I don't know what the start date would be. It's not a project with a duration. I want to use today, but it doesn't incorporate workdays.

Please help! Thank you!

SampleSheet.jpg

Sorry, here is the chart again

SampleSheet.jpg

Sorry, here is the chart again