>>14 The problem with black and white is that it's very formal. If you're going to an interview for an entry position to your average blue-collar job, you don't want to go in wearing a black and white skirt suit, as it can be taken as somewhat pretentious. However, if you're going to apply to an office scenario job, it would be far more appropriate attire. Wearing a dark navy suit is appropriate for the average interview, though, and is recommended.
You also shouldn't wear light-neutral colored suits (brown, tan, blue-gray, etc.) because they're particularly laid back; they're often fine to wear at the job itself but are a bit cheeky for an interview.
If you can't afford to get a jacket/skirt/pants in a navy but have them in black, then just change the color of your blouse/tie to something more relaxed. A black suit with a light blue or tan blouse will balance one another.
And not all employers are bothered by overdressed applicants. Some actually respect the effort ^^ It all depends on where you're applying. It might be best to look up their processes and see what they suggest or if there is anyone online who has shared their interview experiences.