Sub test()
Dim Plg As Range
Set Plg = Range("B3:B7")
Dim c As Range
For Each c In Plg
For I = 1 To Len(c.Value)
If c.Characters(I, 1).Font.ColorIndex = 3 Then
c.Characters(I, 1).Font.ColorIndex = 5
c.Characters(I, 1).Font.Bold = True
End If
Next I
Next c
End Sub