The color of water is influenced by various factors, including the interaction of water molecules with light and the presence of other substances dissolved or suspended in the water. The color of seawater depends on the ability of water molecules to absorb and reflect light. Sunlight contains all colors, which we call white light. Sea water molecules, like those in the atmosphere, absorb the red colors in light and reflect the blue colors. In other words, they retain high-frequency wavelengths and reflect low-frequency wavelengths. Since blue also has a shorter wavelength, seawater often appears blue. One of the main reasons for this color is the depth of the sea layer. Incoming light frequencies give off color according to depth. As the depth of the water increases, the blue color becomes more pronounced. Therefore, people who are planning to have a pool built expect it to resemble seawater.

