Create a serene and calming atmosphere in your kitchen with a coastal gray-blue theme. Paint the walls in a soft gray-blue shade to evoke the tranquility of the ocean. Choose white cabinets and countertops for a clean and timeless look. Incorporate seashell accents by using seashell-shaped drawer pulls or a seashell mosaic tile backsplash. Add coastal colors with aqua or seafoam green accessories. Complete the ambiance with natural textures like a jute rug or woven baskets.