CariadAgain
I would wear it in your position.
AFAIK the only "rules"/customs are the bride is the only one that gets to wear white. Other people should avoid the bridal colour.
Last wedding I went to was some time back now - so I wore a "best" dress I had anyway (ie long length/long sleeves/high-ish neckline/Laura Ashley). It was multicoloured. I figured it covered all bases - not white/not sexy (and I was prone to wearing low necklines - but that dress was a bit more cover-up than that).
I think white or "sexy" are the only faux pas these days for female guests at weddings.
I was sent photos of my cousin son’s wedding in Australia - on the beach, everyone wore white (!!) and were barefoot. It actually looked lovely.


