The Color property returns or specifies the Color object that represents the color of the drop shadow.
Examples:
The following VBA example changes the color of all drop shadows to red.
Sub Test()
Dim s As Shape, eff As Effect
For Each s In ActivePage.Shapes
For Each eff In s.Effects
If eff.Type = cdrDropShadow Then
eff.DropShadow.Color.RGBAssign 255, 0, 0
End If
Next eff
Next s
End Sub