Format.Line.ForeColor.RGB Overrides MarkerForegroundColor

Question

Excel VBA Line Color / Marker Line Color showed the difference between Format.Line.ForeColor.RGB and MarkerForegroundColor, and I found that Format.Line.ForeColor.RGB influences MarkerForegroundColor.

Sub color_border()
    With ActiveChart.FullSeriesCollection(1)
        .MarkerForegroundColor = RGB(255, 0, 0)
        .Format.Line.ForeColor.RGB = RGB(0, 0, 255)
    End With
End Sub

Do I need to always MarkerForegroundColor to countermand Format.Line.ForeColor.RGB? How can I separately change Format.Line.ForeColor.RGB not affecting MarkerForegroundColor?

What I need is Format.Line.Visible = msoFalse for not Format.Line but MarkerForegroundColor only, but it seems impossible.

Updated: This is my code.

Sub BlueDotRedLine()
    ActiveChart.FullSeriesCollection(1).MarkerBackgroundColor = RGB(0, 0, 255)
    ActiveChart.FullSeriesCollection(1).MarkerForegroundColor = xlNone
    ActiveChart.FullSeriesCollection(1).Format.Line.ForeColor.RGB = RGB(255, 0, 0)
End Sub

Sub RedLineBlueDot()
    ActiveChart.FullSeriesCollection(1).Format.Line.ForeColor.RGB = RGB(255, 0, 0)
    ActiveChart.FullSeriesCollection(1).MarkerBackgroundColor = RGB(0, 0, 255)
    ActiveChart.FullSeriesCollection(1).MarkerForegroundColor = xlNone
End Sub

These are the results. BlueDotRedLine applies white borders around markers. RedLineBlueDot applies red borders around markers. I need markers have no line—the bottom-right one.