"Water is colorless or transparent and in large bodies like ocean, it appears to be blue, due to the scattering of light". This is what we have studied at elementary classes. I also had the same belief. But recently I came to know the ultimate truth. The colour of water is "Turquoise Blue." i.e. the water itself is a blue-coloured chemical. According to the frequency spectra for pure liquid water, a short water column has a very light shade of turquoise blue. Thicker layers (many meters) appear much darker blue. It is only when collected in a large body that water's blue colour becomes apparent.
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