FillFormat.BackColor (Word)
Devuelve o establece un objeto ColorFormat que representa el color de fondo para el relleno de lectura y escritura.
Dim docActive As Document
Set docActive = ActiveDocument
With docActive.Shapes.AddShape(msoShapeRectangle, _
90, 90, 90, 50).Fill
.ForeColor.RGB = RGB(128, 0, 0)
.BackColor.RGB = RGB(170, 170, 170)
.TwoColorGradient msoGradientHorizontal, 1
End With