If your document has only one Section, you can use code like:
Code:
Sub Demo()
Application.ScreenUpdating = False
Dim RngStory As Range
For Each RngStory In ActiveDocument.StoryRanges
With RngStory.Find
.ClearFormatting
.Text = ""
.Font.ColorIndex = wdBlue
With .Replacement
.ClearFormatting
.Text = ""
.Font.ColorIndex = wdBlack
End With
.Forward = True
.Wrap = wdFindContinue
.Format = True
.Execute Replace:=wdReplaceAll
End With
Next RngStory
Application.ScreenUpdating = True
End Sub