Excel Highlight date within 60 days of another date

Assume 

1. Data starts from row 2 to row 1000

Steps

1. Select J2
2. Create a name in Name Manager, NoOfLookBackDays

   =60

3. Create a name in Name Manager, PaidDateInclusive

   =TRUE

4. Create a name in Name Manager, CFCheckingValue

   =(INT(Sheet1!$C2) - INT(Sheet1!J2) + PaidDateInclusive) <= NoOfLookBackDays

5. Home > Styles > Conditional Formatting > Manage Rules > New Rule... > Use a formula to determine which cells to format
6. Type the following formula for the rule

   =CFCheckingValue

7. Apply a format to fill a background colour
8. Click OK buttons to confirm and back to Conditional Formatting Rules Manager
9. Type the following reference address to box of Applies To for the rule

   =Sheet1!$J$2:$L$1000

Try it to see if it is what you want.

If other community members have a better solution, please share.  I feel myself limit in the approach which I get fimilar with.