What shows you how a fill color will look before you apply it in exel?

In Excel, the "Fill Color" button on the Home tab provides a preview of how a selected fill color will look before applying it. When you click on the dropdown arrow next to the Fill Color icon, a color palette appears, allowing you to hover over different colors to see a live preview in the selected cell. Additionally, the "Format Cells" dialog box also offers a preview option when you choose the Fill tab.