For a sophisticated coastal kitchen, choose a nautical navy color scheme. Paint the walls in a deep navy blue, creating a sense of depth and richness. The cabinets can be a crisp white or a light gray to provide a clean and modern look. Incorporate nautical elements such as rope drawer pulls and ship wheel wall decor. Add touches of brass or gold hardware for a touch of elegance. The countertops can be made of dark granite or marble, adding a luxurious feel. This colorful kitchen exudes a sense of timeless coastal charm, perfect for those who appreciate classic design with a modern twist.