Hi I am looking for the correct paint code for dark blue stripes on my 1990 Triple E C class rv. The only code it shows is YY inside the door. This is a Ford commercial white. But does not show the code for the dark blue stripes. The only dark blue code that is listed in commercial is MK which is Twilight Blue Poly. Could anyone please advise if this is what I need to be ordering or any other suggestions would be greatly appreciated. Many thanks.