I find in "can I wear this to a wedding?" threads I'm (oddly) drawn to Harry and Megan's wedding guests to check if whatever the offending item is appeared there.
Previously pashminas, cream and pale dresses and short skirts have all appeared.
As for "attention seeking" - well I suppose if you were really uptight about it then 99% of the guests. I'm posting this link not because I think it's "attention seeking" but because it's a fabulous dress. Why shouldn't a wedding guest not wear a fabulous dress?
Orange dress at Megan's wedding