I think it will be fine.
It is clearly silver in colour and not a bridal gown/wedding dress.
Mumsnet can be weird at times.
Thats reflective of the general public though, I had a number of people actually angry that someone wore a light coloured dress to our wedding. Firstly I didn’t know the white thing back then, secondly to me it didn’t look white (thirdly I couldn’t have given the least of a shit!!!!)
People like drama and you unfortunately might get looks, especially at the evening part