Easy search - By format  

1. Include the active cell in the range to be searched.
2. Click on the Easy Search button in the toolbar.
The selected range is automatically detected as the search range.
If that is not the range to be searched, you may choose another manually.
3. Finally, decide which sheets contain the same range to be searched.

4. Now, choose the search mode. In this example, choose Search By Format
5. We have to choose the cell with the background color of the cells to be searched.

Finally, decide what to do with the data, namely:
a. Select the cells meeting the criteria.
b. Do mathematical operations with resulting cells.
c. See search statistics
d. Browse withing resulting cells.
e. Print an Easy Search report.