1. Be safe rather than sorry.
Dress the part for the position, the company and the industry, erring on the conservative side. Most times, you will not know how the interviewer will be dressed, so wear a more formal, layered attire that can become more casual if necessary.
You will rarely be faulted for being slightly overdressed. When you wear layers, you can always take off a jacket, tie, scarf or jewellery to appear less formal. Safe doesn’t mean boring.
You can make your attire interesting by adding a dash of colour, like a pink top beneath a grey jacket, or matching striped tie.