Black is strong, moody, severe, and intense. Blue is calm, intelligent, and serene but when paired with black it too can be fierce. A pastel blue may be playful but royal blue is passionate and bold. Such a bright jewel tone does not contrast with black, it plays with it cooperatively, evoking power and a take-charge attitude. This is the right look for a business function in the evening wherein you want to be instantly respected and taken seriously.