Sub Colore()
For L = 2 To 1000 ' A adapter suivant besoin
If Cells(L, "A").Interior.Color = vbWhite And _
Cells(L, "A").Offset(-1, 0).Interior.Color <> vbWhite And _
Cells(L, "A").Offset(1, 0).Interior.Color <> vbWhite Then
Cells(L, "A").Interior.Color = vbYellow
Cells(L, "A") = "TTT"
End If
Next L
End Sub