Press
Ctrl-H, and click the
More button in the Find and Replace dialog. Click the find tab.
Click the
Format button, and select
Font.
Select the color to be changed—leaving all else blank—and click OK.
Click the Replace tab, and repeat steps 2 and 3 to select the new color.
Click Replace All.

Another ref.
https://cybertext.wordpress.com/2019/03/30/word-find-and-replace-a-custom-font-colour/
- Open the Find and Replace dialog (
Ctrl+H).
- Make sure the cursor is in the
Find field.
- Click
More.
- Click
Format.
- Choose
Font.
- Click the drop-down arrow for
Font Color.
- Click
More Colors.
- Enter the RGB values you want to find (e.g. 255, 51, 153).
- Click
OK. The text under the Find field should show the RGB values you selected; for example: Font Color: Custom Color (RGB(255,51,153)).
- Place your cursor in the
Replace field.
- Repeat Steps 4 to 7.
- Enter the RGB values you want to use for the replace (e.g. 230, 131, 76).
- Click
OK. The text under the Find field should show the RGB values you selected; for example: Font Color: Custom Color (RGB(230,131,76)).
- Click
Find Next, then click
Replace for the first one found.
- Repeat Step 14 until all are found, or, if you are confident that you won’t mess up anything else, click
Replace All.
来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/12707874/viewspace-2885816/
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