Is there anything that is more classic? Using these colours is a simple yet very effective way to put together various different looks due to its simplicity and versatility. Black and white can be paired with a variety of different colours and patterns (stripes, chevron for example) to create that chic look. On its own however the colour contrast between black and white is bold enough to make a statement on its own. For example: an all white dress with bold, black piece of statement jewellery, or wearing "all black everything" with the exception being a fresh pair of white shoes.
If done correctly, a well picked black and white piece can become a staple in your closet. Black and white matches many different colours and patterns which allow these pieces to bridge together outfits which is beneficial for both your look and your checkbook.
Thanks for reading and good luck!