paint code

Does anyone know the paint code for Speedway White? I've been all over the place looking for it, even Aston Martin themselves don't show it in any year/model. I finally obtained the window sticker for my 2015 Vantage GT and it indeed shows the color as Speedway White. Unfortunately I picked up a rock chip on the nose and need to fix that. I've read from various sites that the color was anything from a special order color (no charge for that showing on my sticker) to a rare color to a GT specific color option. I've also looked throughout my car and can't find any code in any location suggested.