How do I change the background color?
If you want to change the background color of a cell, follow the steps below.
First, select the cell you want to change (make sure it's unprotected).
Go to the menu bar at the top of your screen, and click the "HOME" tab.
Then find the paint bucket, and click on the little arrow next to it.
A color palette will appear. Choose the color you want and the background color of your cell will change.