1. Open OUTLOOK and enter "Options" in the file menu.
2. Open the options window and click the "Mail" tab in the navigation menu on the left.
3. Find the "Letter Paper and Fonts" button on the right and click to open it.
4. Enter the personal stationery interface. You can see that the font color of new emails is black, and the font color of replies and forwarding is blue.
5. Now we change the font color of the reply to black and click the "Font" button.
6. Open the font window and change the color in the font color to the desired black.
7. Confirm and return, you can see that the fonts of new creation and reply are now uniform black.