why is the sea blue?

As we live on a pebble mainly covered with water, and as this pebble bears the pretty name of “the blue planet”, it seems legitimate to wonder about the reasons of a such uniformity. All the more because the blue mirage that can be seen from space is less visible when our feet are in the water. We have all noticed that if the sky is blue, the sea dons its blue clothes, and if the sky is gray, the sea’s dressed in dark. Would it mean the sea is endowed with the ability to change its looks according to its mood? That’s not likely. On the other hand, a more coherent explanation, at least for its surface, is that the colour of the surrounding sky reflects itself on the sea and gives it its colour. As to the deeper layers, the blue colour is given by the penetrating sunbeams. When a sunbeam hits the water surface, it doesn’ stop its course at once, but splits into different hues as it goes deeper. The colour yellow disappears along the first meters, then the red fades, and finally the green. The only colour left is blue. So, what gives the sea its different hues are its variations in depth. The shallower it is, the lighter the blue (we can even have green); the deeper it is, the darker the blue (it can even get black). Now you are going to ask me why there’s a red sea and a black sea? Well, the other colours we can find in the sea are related to the nature of the bottom of the sea (corals, sand,…), or to the elements in suspension in the water (earth, weeds, pollution,…).

thats very simple. water has no color. the sea will look reddish or orange in color during sunrise, in the day it appears blue and at dusk its dark gey and at night its black. this shows water reflects the suns light.

Because it refelects the colour of the sky

It reflects the sky.

Because Sky Is Blue

I think the sea is blue becuase it is reflecting the sky. Acutally as you all know water is clear.

I Dontt Know

the color sea is blue because there is a sky....

it seems the sea is blue ,but actually it is because the sky is blue ,so is the sea.

According to science, the sea look blue because of the reflection from the sky. I'm not so sure about it.

its not its clear

Maybe because the blue sky reflects on water

its not waters clear it reflects off the sky