oGraph.Color = "#00ff00" 'color setting by RGB String
sColor = oGraph.Color 'in sColor is a RGB String in the form "#RRGGBB"
When the object is created, the value of this property is copied from the TrendsView.GraphInit object.
If the tvTrend object is connected to the trends server (e.g. by means of calling the Connect method), then it is possible to set the property to the value of "$default". Thus the value of the property is read from the server (from the PmTrend object) from the Color configurator.