Hi - Please help

I am looking for a formula. I want to colour cells in ColumnP when ColumnP (row 9:500) is blank and B2(the NOW date) is less than 42 days from dates in ColumnB (row9:500)

Basically Im looking to highlight cells that are not populated with a date(columnP) 42 days before the required date(column). The cells being active to todays date(b2) or NOW