Also Read: How to change the color of the Excel worksheet Tab. If you want, you may preview the text occurrences one by one and replace the forecolor using the Find Next and Replace options.

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.

Microsoft 365 Office apps base color options on the applied theme, but you can change the theme or add custom colors to color palettes.