How to create Cell borders and fill colors in excel worksheet

To add a border to the cell
1. Select the cell(s) you wish to modify.

2. Click the drop-down arrow next to the Borders command on the Home tab. The Borders drop-down menu will appear.

In this example, I choose the thick box border. 

To add a fill colour

1. Select the cell(s) you wish to modify.

2. Click the drop-down arrow next to the Fill Color command on the Home tab. The Fill Color menu will appear.

3. Select the fill colour you want to use