Yes if no lace.... no floaty chiffon or anything else that is remotely bridal a simple white shift with bold accessories and a coloured jacket is just about ok but not really the done thing...nor should you wear the same colour as the bridesmaids
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joko
basically its ok as long as no-one could mistake you for the bride - so perhaps coloured shoes, bag, tights, jewellery, hat etc and maybe a jacket or wrap or something.