unexpected(?) errors when using msoRGBType variables

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Version 2.5.2.5906
OS: Microsoft Windows NT 10.0.22000.0, x64
Host Product: Microsoft Office x64
Host Version: 16.0.15225.20288
Host Executable: EXCEL.EXE

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The following debug-passing code, that I also found on [Stackoverflow],(https://stackoverflow.com/questions/28809779/vba-valid-rgb-value-throws-out-of-range-exception) throws 4 unexpected(?) RD errors (!):

Sub TEST()
    Dim light As MsoRGBType
    light = RGB(195, 214, 155)
    ActiveSheet.Shapes("Arrow1").Line.ForeColor.RGB = light
End Sub

I think that the errors are related to the ambiguity of the RGB values, that are Long and msoRGBType object(?) at the same time. I'm honestly confused about this fact, so I'm not sure about how RubberDuck should behave in this case.