The default active cell format in Microsoft Excel isn't all that easy to see, but you can use this easy-to-implement code solution to change that.

You can type codes in VBA Editor to change the cell colors in Excel. Learn how to change the cell background color with VBA Editor in Excel.

Unfortunately, you won’t find the “edit this cell” command listed in Excel’s keyboard customization section, so there’s no apparent way to change the shortcut.

To change Gridline color in Excel, use Excel Options, apply a custom-colored border to the cells, or apply a custom line color. Full details here.