RGB Function

Returns a Long integer color value consisting of red, green, and blue components.

RGB (red1, green1, blue1)

Long

red: Any integer expression that represents the red component (0-255) of the composite color.

green: Any integer expression that represents the green component (0-255) of the composite color.

blue: Any integer expression that represents the blue component (0-255) of the composite color.

The resulting Long value is calculated with the following formula:
Result = red×65536 + green×256 + blue.

Under VBA compatibility mode (Option VBASupport 1), the Long value is calculated as
Result = red + green×256 + blue×65536
See RGB Function [VBA]

The color picker dialog helps computing red, green and blue components of a composite color. Changing the color of text and selecting Custom color displays the color picker dialog.

Sub ExampleColor
Dim lVar As Long
    lVar = rgb(128,0,200)
    MsgBox "Värin " & lVar & " koostumus:" & Chr(13) &_
        "punaista = " & Red(lVar) & Chr(13)&_
        "vihreää = " & Green(lVar) & Chr(13)&_
        "sinistä = " & Blue(lVar) & Chr(13) , 64,"Osavärit"
End Sub