下記で右辺のRGBでコンパイル・エラーargument not optionalがでて
進めません。（XP + Excel2000）

Sub Test()
Dim myIndex As Variant
Dim length As Integer
myIndex = Array("235,180,200", "255,110,80", "255,0,0")
For i = 0 To 2
ActiveSheet.Shapes.AddShape(msoShapeRectangle, 0, 50 * i, 100, 50 * (i + 1)).Select
Selection.ShapeRange.Fill.ForeColor.RGB = RGB(myIndex(i)) 'error
Next i
End Sub