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The sky is actually black but the reflections of sunlight on the sea causes it to appear blue. There are also other causes of the sky colouration.

Dust in the upper atmosphere can make it turn red or purple.

The last few seconds of the sunset when passing through the waves of the ocean can make it appear green.

A grey sky can be from storm clouds.

A white sky can be ice in the upper atmosphere.

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12y ago

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