Certainly no jeans. I'd say you have two options:
1: Navy jacket, grey trousers, white or light blue shirt, possibly with a stripe, neutral neat or reppe tie.
2: Navy or charcoal grey suit, the rest as above.
Black, decent shoes. If I were interviewing, any square-toed shoe would be an instant rejection.
"Instant rejection"? That really is totally wrong. Simply because a candidate does not measure up to your ideas of dress, you do you employer a grave injustice - I wonder how many other prejudices you have, consciously or otherwise? Your objective is to find the best person for the job, none other.
It is to be hoped that the OP does not come up against this approach.