The property returns/sets the RGB String in the form "#RRGGBB".
The property is used only if the table mode is set.
When the object is created, the value of this property is copied from the PmgTrendViewer.GraphInit object.
var oTView = pMe.Items("../TrendView");
var oGraphDef = oTView.Trends("t1").GraphDefault;
oGraphDef.TableBgColor = "#d0d0d0"; //writing
oTView.Draw();