Ocean hue is a term used to describe the various shades of blue, green and aqua that can be seen in the ocean. The term can be broken down into three crossword solutions: aqua (4 letters), seablue (7 letters) and seagreen (8 letters). Aqua is a light blue-green color, seablue is a deep blue color and seagreen is a bluish-green color. All three colors are commonly seen in the ocean and can be used to describe its overall hue.