What would be the appropriate wedding attire for an older woman who is officiating (me) (perform the ceremony) at a relatives daytime wedding service (probably on a beach or in a garden if not raining)? A suit, a skirt with dressy jacket, a dress. I am more a suit/slacks type person in my 60's. Thank you

I am in my 60s too, and I would choose a long skirt with a blouse and jacket.
And my colours for formal attire are black and white, navy and white, etc.

Ms tickle