a Light Spectrum Earth from the Sun, the human eye can only see human When light comes to the called the visible ocean, all colors narrow spectrum of that light. This is shines on the in the upper eye is sensitive to certain colors. When the Sun absorbed of light enter the water. The yellow and red light is portion of the ocean. However, only the green and blue spectrum of light gets reflected back to the human eye. This is why the ocean seems blue. In other words, the color of water as seen by the human eye is a result of how light interacts with water.