No, it is not blue because the sky is blue as the common myth says it to be. Rather, the color of the ocean begins with the fact that light is compromised of many different colors of the color spectrum such as purple, blue, green, yellow, orange and red (listed by increasing wavelength). In the bottom of the ocean lies complete darkness, also known as the absence of light. The deeper you go into a body of water, the less light there is. In a way light is “filtered” and this is also known as light attenuation. Light gets “filtered” due to water molecules absorbing the colors with longer wavelengths (yellow, orange and red). This allows colors like blue, and even green, to penetrate the waters for a longer period of time and be visible to the eye.
-Nicole Acnam
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