Question: is the vinyl color opaque high performance or translucent?
In high performance Gerber's Periwinkle (220-387) is fairly close. There's nothing in the 3M/Gerber translucent range (230/3630) that is even in the ball park to Pantone 7683 C. I'm going by my physical Pantone Plus Series swatch books.
In Avery the closest I see in hue for high performance is Tropical Blue A9503-O, but it's a step or two lighter (the book says it's a match for Pantone 297 C although actual Pantone 279 C is less purple looking). In the translucent range it's basically the same story, Tropical Blue A9503-T. Similar hue but lighter than Pantone 7683 C.