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.

Colors on Excel Worksheet Tabs are a great way to organize them. We will discuss how to add or change the color in Worksheet Tabs.

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.