The dealer also showed me a sample of White Silver. He set it on a Reflex Silver Passat. Imagine Reflex Silver with no shine and no sparkle i.e. flat light grey! I think a white car would look much better than a light grey car.
Colour choice is a very personal thing. One person's favourite is another person's least favourite. My current car is blue and IMO the red accents work well with the blue paintwork. Personally speaking, silver isn't a colour I'd ever choose, even though some shades of silver look good on certain cars; I think Reflex Silver looks good on a Golf, as does Tungsten Silver.
A little off-topic, but a consideration for me when choosing a colour is how easy it is to repair / colour match if you're unfortunate enough to need paintwork repairs. I used to have motor vehicle inspection engineer contacts in one of the large UK insurance companies and they told me that silver is a notoriously difficult colour to match, even when blending the repair area into adjoining panels. It was the colour they received most complaints on, post-repair. Hopefully, with modern paint mix / matching technology this isn't such an issue nowadays, but I'd be really annoyed and disappointed if I had a silver car that needed bodywork repairs and it came back with 'patchwork' paint after being repaired.