Yeah, my Mum's car is silver, she'd always fancied a silver car apparently, and then when she got it she suddenly realised how many others out there were silver - whether it was the case the silver just happened to become more popular, or that she just noticed them more, I don't know...
Thinking about it, my FCR is red and silver, my Galaxy was blue and silver and my hack is blue and yellow, but with Chrome forks (so sort of silver!). My trike is black and orange though. And of all those, the only one I had a choice of colour over was the Galaxy, because we resprayed it. One day, I'll get round to having it painted properly again (the paint started to chip, so it got stripped down, and then events overtook me and it's still in a shed, waiting). And I think blue and silver is the way I'll go again....
Best colour for safety apparently, is yellow visible against grey mist, snow, the lot. Less visible in fields of Oil Seed Rape, I guess.