Point.MarkerBackgroundColorIndex (PowerPoint)

Returns or sets the marker background color as an index into the current color palette, or as one of the following XlColorIndex constants: xlColorIndexAutomatic or xlColorIndexNone. Possible return values are xlColorIndexAutomatic - Automatic color, xlColorIndexNone - No color.

The property applies only to line, scatter, and radar charts.

ActivePresentation.Slides(1).Shapes(1).Nodes(1).Points(1).MarkerBackgroundColorIndex = xlColorIndexAutomatic