To highlight the teams in the first list that are not in the second list, execute the following steps.
1. First, select the range A1:A18 and name it firstList, select the range B1:B20 and name it secondList.
2. Next, select the range A1:A18.
3. On the Home tab, in the Styles group, click Conditional Formatting.
4. Click New Rule.
5. Select 'Use a formula to determine which cells to format'.
6. Enter the formula =COUNTIF(secondList,A1)=0
7. Select a formatting style and click OK.
Result. Miami Dolphins and Tennessee Titans are not in the second list.
Explanation: =COUNTIF(secondList,A1) counts the number of teams in secondList that are equal to the team in cell A1. If COUNTIF(secondList,A1) = 0, the team in cell A1 is not in the second list. As a result, Excel fills the cell with a blue background color. Because we selected the range A1:A18 before we clicked on Conditional Formatting, Excel automatically copies the formula to the other cells. Thus, cell A2 contains the formula =COUNTIF(secondList,A2)=0, cell A3 =COUNTIF(secondList,A3)=0, etc.
8. To highlight the teams in the second list that are not in the first list, select the range B1:B20, create a new rule using the formula =COUNTIF(firstList,B1)=0, and set the format to orange fill.
Result. Denver Broncos, Arizona Cardinals, Minnesota Vikings and Pittsburgh Steelers are not in the first list.
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