Hi Katie,
Good day and welcome to the community. Below are my approach in achieving your request. It can be done within one column:
- Select your date column (in your case Column B)
- Select conditional formatting and add two rules: 1. =TODAY()-B1=10 and highlight with orange; 2. =TODAY()-B1>10 and highlight with red.
- Please also remember to set the cell format as Date
I hope this can help!
Clover-L - MSFT | Microsoft Community Support Specialist.