LineFormat.BackColor (Word)
Devuelve o establece un objeto ColorFormat que representa el color de fondo de una línea de entramado.
Dim docActive As Document
Set docActive = ActiveDocument
With docActive.Shapes.AddLine(10, 100, 250, 0).Line
.Weight = 6
.ForeColor.RGB = RGB(0, 0, 255)
.BackColor.RGB = RGB(128, 0, 0)
.Pattern = msoPatternDarkDownwardDiagonal
End With