Interviews are a crucial time to make a lasting first impression. You absolutely must give off the impression that you’re a serious,dependable person.
Wear either a suit or a pair of chinos paired with a blazer. The dress shirt is a must. The only accessories you can wear during an interview to give off that professional vibe are watches and ties.
A word of caution about dressing for an interview: don’t overdo it. You need to impress your potential employee through your knowledge first and foremost. You don’t want to take the focus off that by wearing colors that are too bright.