How to Change the Color Coding on a Microsoft Excel Graph Legend. Color can make it easier for people to identify important information, such as legends on an Excel graph.

You can change the default color of chart, graph, treemap, etc. in Word, Excel, and PowerPoint with the helpof these simple steps.

Text-based Axis Double-click on the Excel file that contains your graph. Once the spreadsheet opens, click anywhere on the graph to select it.