VBA: Script that changes new text to another color

Hello, this may be impossible, but I need a script that will change the color of new text entered in a cell. What I have right now changes the whole text color in the cell, I only need the specific text that was modified. This is what I have (the code was found in this forum by User: Palmetto) Any ideas?

Sub Worksheet_Change(ByVal Target As Range)

    If Not Intersect(Target, Range("H8:L300")) Is Nothing Then
        If Target.Font.ColorIndex = 5 Then
            Target.Font.ColorIndex = 1
        Else
            Target.Font.ColorIndex = 5
        End If
    End If
    
End Sub