Here is an excerpt from an old post from Mike Drew that may help. I provided the code DBC 3822C to my painter and he said he could work with that.
The absolute, dead-nuts, spectacularly accurate modern color match for > > original factory Campy wheel paint is: > > > > DBC 3822C, known as Bright Silver Poly > > > > Not only is it the right shade of silver, but it also has the correct > > metallic content. There were several variations on this color available > that were, > > in fact, the same 'color', but had more or less sparkle added.
Here is the entire post.