Create a 4K image of an outdoors sky during a sunny day, featuring a cloudy sky with blue tones. The scene should include a vast ocean with a horizon line, where the reflective water mirrors the sky's colors. Focus on the blue theme, emphasizing the reflection in the water and the horizon line. No humans should be visible in the image. Ensure the style is natural and realistic, capturing the serene and tranquil atmosphere of this coastal landscape.
