public Color SheetTabUpperNormalColor {get; set;}

FarPoint.Win.Spread.EnhancedInterfaceRenderer eir = new FarPoint.Win.Spread.EnhancedInterfaceRenderer();
eir.ScrollBoxBackgroundColor = Color.Beige;
eir.SheetTabBorderColor = Color.BurlyWood;
eir.SheetTabLowerActiveColor = Color.BlanchedAlmond;
eir.SheetTabLowerNormalColor = Color.Brown;
eir.SheetTabUpperActiveColor = Color.Chocolate;
eir.SheetTabUpperNormalColor = Color.DarkGoldenrod;
eir.SplitBarBackgroundColor = Color.DarkKhaki;
eir.SplitBarDarkColor = Color.DarkOrchid;
eir.SplitBarLightColor = Color.DarkSalmon;
eir.SplitBoxBackgroundColor = Color.Bisque;
eir.SplitBoxBorderColor = Color.Cornsilk;
eir.TabStripBackgroundColor = Color.Beige;
eir.TabStripButtonLowerActiveColor = Color.BurlyWood;
eir.TabStripButtonLowerNormalColor = Color.BlanchedAlmond;
eir.TabStripButtonLowerPressedColor = Color.Brown;
eir.TabStripButtonUpperActiveColor = Color.DarkGoldenrod;
eir.TabStripButtonUpperNormalColor = Color.DarkKhaki;
eir.TabStripButtonUpperPressedColor = Color.SaddleBrown;
fpSpread1.InterfaceRenderer = eir;
fpSpread1.Sheets.Count = 3;