Create a serene and beachy atmosphere in your kitchen with a coastal blue color scheme. Paint the walls in a soft shade of blue reminiscent of the ocean waves. Install white cabinets and add glass inserts to create a light and airy feel. Choose countertops in a light gray or white marble to mimic the look of sandy beaches. Complete the coastal look with seashell accents such as drawer pulls, cabinet knobs, and decorative items like seashell-shaped bowls or wall art.