Floor Object
Border
Interior
Represents the floor of a 3-D chart
Using the Floor Object
Use the Floor property to return the Floor object. The following example sets the floor color for embedded chart one to cyan. The example will fail if the chart isn’t a 3-D chart.
Worksheets("sheet1").ChartObjects(1).Activate
ActiveChart.Floor.Interior.Color = RGB(0, 255, 255)