You can set tracked changes and comments to appear in different colors for different authors. But Word automatically picks which color represents each author—and that color might change when you reopen the document or someone else opens the document.
Click Review > Tracking Dialog Box Launcher.
Click Advanced Options.
Click the arrows next to the Color boxes and the Comments box, and choose By author.
You can also color-code text moves and changes made to table cells.
Tip: To see everyone’s changes in a single color, click that color instead of By author. For example, to see all insertions as Turquoise, click the arrow by Color, and then click Turquoise. Now everyone’s insertions are colored turquoise.
These color settings are for your computer only. Other people will see the tracked changes in whatever colors they set up. The By author colors will look different on different computers, too.