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.

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.

The latest update to Excel for the web brings new options for cell colors, cell formatting, and tables. There's also a new printing experience on the way.