How do I change the color of one cell (N5) based on the two other cells "is not empty" (C5&D5) [closed]

What formula would I use in Google Sheets if I want a cell(total dose, N5) to turn red if Cell C5 and Cell D5 are no longer blank? or "is not empty"

For example, I want N5 to turn red when C5 & D5 have numbers added to them (or are no longer empty).