Returns or sets a Variant value that represents the color of the interior.
expression A variable that represents an Interior object.
The color is specified as an index value into the current color palette, or as one of the following XlColorIndex constants: xlColorIndexAutomatic or xlColorIndexNone.
The following example sets the background color of range A1:D1 to 1.
Range("A1:D1").Interior.ColorIndex = 1