What colour jewellry with purple dress?
I would suggest silver jewelery. You can also try pewter, which will maybe be a bit darker and less blingy. You can also try something black like jet, but maybe not perspex or plastic, as that can look a bit cheap for the occasion. As for the shoes and bag, it will be very hard to match them to the exact purple of the dress. There are thousands of shades of purple, and because of the nature of certain fabrics it’s unlikely that you will ever find shoes or a bag that will be the same purple as the dress. And you definitely don’t want to have accesories that are in different colours than the dress, however slight. I’d seriously advise you to try for silver or black, depending on which look you want. A very simple, elegant pair of silver shoes will look much better with a purple dress than purple shoes would. And a bright and shiny silver clutch will look much more elegant and glamorous than a purple bag would. I always find it easier to buy the dress and match the shoes, bag and jewelery