It's important to make sure your bar pulls coordinate with the handles on your appliances. Not only should the colors look good together, but the shapes have to be complementary. Drastically different shapes can give the kitchen a cluttered feel, likely the opposite of what you are trying to achieve.
Casual/modern style kitchen in city home with authentic face-framed contemporary inset cabinets by Wesley Ellen Design & Millwork. These flat front inset cabinets would have a modern feel ----island looks slate gray with white perimeter cabinets-