Private Sub Worksheet_Change(ByVal Target As Range)
Dim c As Range
Application.ScreenUpdating = False
Application.EnableEvents = False
With [B5:B14] 'à adapter
.Font.ColorIndex = xlAutomatic
For Each c In .Cells
If c.Text = "" Or c.Text = c(1, 2) Then c(1, 2).Copy c
Next
End With
Application.EnableEvents = True
End Sub