I'm not very good at stuff like that - as you say it is tricky with a winter wedding. I'm wondering if you can have colourful accessories? I really like that dress though it is lovely.
OK so I have just done some reading on line and I can't find anything that says anything about grey - black no and white (or brides dress colour) no but nothing about grey even for looking for it. I think it would be fine
Anything else you've seen that you like?
Good point @ems101 that could look really good or a bright colour (red / hot pink / turquoise what ever you like) with handbag, scarf, jewellery etc