The mustard and charcoal gray combination is a striking and stylish choice. It would look great with a pair of classic blue jeans for a casual look or even black jeans for something a bit trendier. Layering with a cute jacket, like a denim jacket or a chic leather one, would elevate the outfit even more. You could also accessorize with some simple jewelry or a cozy scarf to complete the look. Perfect for a chilly day!