I can answer this(and you'll probably not like the answer). You'll have to go to a bodyshop or custom painter. I needed the red for my 02. There was 1 place in the US that had touchup and paint for Guzzis. And for v11s they had I think tenni green, guzzi red, and some of the flat silvers and greys. Not my red. Called Guzzi America/Piaggio in NYC. They had nothing. No color code, nada. It was if Aprilia bleached everything in the change to Piaggio or something.
A good custom painter or bodyshop will be able to match it perfect since paint color can change with sun exposer and time. I used Colorzone in Huntington Beach, CA. Send him a sample part with the paint color and he will make it.