It depends. Are you the one getting married? Or are you just going? If your getting married, you could wear a champange colored silk dress, but the traditional color for the bride is all white. If you are just attending the wedding ceremony, it would be best to follow the desired colors that the bride and groom have selected for their color theme. But if one isn't provided, then there shouldn't be a problem.
Of course ,I have a friend once attend the wedding she wears the same color wedding dress with you just do it .