Color coding planner periods

I know that you can color code classes on the schedule and planner, but I was wondering if there is a way of changing the color of the background of each planner period? I was hoping to use this as a way of keeping on top of my own planning, e.g. a different color for lessons where I need to collect in books, a different color where I still have some preparation to do for that lesson, etc.

Is this function available? Or is this something which could be done?