Interview questions are stressful enough. Why worry about how to dress for an interview on top of that!? When it comes to dressing for an interview, I recommend creating a modifiable uniform that makes you feel confident! Personally, I have a fail-safe interview dress code that I've been using since I applied to medical school.
95% of the time, I wear a dress and blazer for interviews. Even more specifically, I have 3 white and black dresses that I wear in rotation. I mix and match my favorite blazers with those dresses to create multiple options of looks that don't require a lot of thought. That way, I can spend most of my time prepping for the interview questions, instead of focusing on outfits!
Below is an example of how I make 3 very different looks, using the same dress!
Starting with the basics
As a lot of people probably do, I tend to sweat a lot during my interviews so I make sure to pick colors and fabrics that don't show the sweat. Sweat stains are a sure way for me to lose confidence on an interview day. So a black blazer is a great cover up for any pit stains that would otherwise be visible.
A tan blazer is another safe option for an interview day. Additionally, the cropped fit and 3/4 sleeves of this blazer add a subtle pizazz to an otherwise conventional look.
Add a pop of color to show your personality
For interview days when I know I'll be less stressed, I use a colorful blazer to showcase my personality and love of fashion. I allocate the colorful blazer for less stressful scenarios because they're not as good at hiding sweat stains as my black blazers. So these only get worn when I don't think I'll be sweating too much haha. I would, however, be aware of the norms of the institution at which you're interviewing before whipping out your own periwinkle blazer. I have (successfully) worn this jacket in business meetings and interviews, but I usually tend to reserve it for slightly more causal employer encounters such as coffee chats.
