I always wear a suit to interviews, with a plain white shirt, and a plain or stripped tie, if it’s a stripped tie then the colours arn’t loud or garish, and polished shoes.
When I’m interviewing it is either suit or work uniform depending on the job.
But then I expect the candidates to have made an effort, proper shoes not dark trainers or ugg boots or even worse crocs, smart trousers or skirt but no jeans, a smart ironed shirt or blouse. I also look for the male candidates to wear a clean tie.
If it’s a customer facing roll, things like visable tattoo’s, visable piercings and makeup all play a part.
At the end of the day it’s down to the interviewer