So on my spreadsheet I am documenting when upcoming changeovers are happening. so in the spread sheet I have a cell that just tells current time using the =now() formula. Then I enter in what time a change over is going to occur. What I want to happen is when the change over is an hour away from current time I want that cell to turn yellow then when the changeover is 15 min away from current time I want it to change red. I tried numerous formulas that i thought would work but did not.