Create a classic nautical look in your kitchen with a coastal beach house theme. Paint the walls in navy blue to evoke the deep sea. Choose white cabinets and countertops for a crisp contrast. Incorporate seashell accents by using seashell-shaped drawer pulls or a seashell mosaic tile backsplash. Add nautical touches with striped curtains, rope accents, and ship-inspired light fixtures. Complete the look with maritime accessories like a ship wheel wall decor or a vintage compass.