Sort by Color
In Excel 2007 or later, it's possible to sort data by color.
To sort data by color, execute the following steps.
1. Click any single cell inside a data set.
2. On the Data tab, click Sort.
The Sort dialog box appears.
3. Sort by Last Name (or any other column), sort on Cell Color (you can also sort on Font Color and Cell Icon), and select the green color for the first level.
4. Click 'Copy Level' two times and select the other colors.
5. Click OK.