I'm new to Google Sheets and need help with conditional formatting. I have Column C, RESPA DATE, that has a date that varies for each borrower. I want to change the color of the cells in Column D, DISCLOSURES SENT, daily within three days of Column C until a date gets entered into the cell. Once RESPA is triggered I have three days to send out disclosures. I was wondering how I could format the cell to change to green on day 1, yellow on day 2 and red on my last day 3 until I enter a date then it goes back to a white cell.