Why is the sky blue
...is probably one of the most frequently asked questions in history. The answer is Waters above. The light from the Sun, Moon, and planets is refracted by the waters above. The color blue has a relatively high frequency. Like all colors of the spectrum, the color blue is a result of a slowing down of the original white light and splitting it into different frequencies. The color blue has the second highest frequency, to the color indigo. The sky is blue because the fabric of the light body of the Sun is slowed down by the waters above to a small degree which suffice to extract the frequency of blue. Were the layer of the waters above thicker than it is now, the light from the Sun would be slowed down to the color green or yellow.
Technically, the sky could have any color, including red, provided that the layer of the waters above were thick enough. Fortunately, it is just as thick as necessary for the extraction of the color blue.
Gases in the atmosphere serve as a screen for the color blue. At higher altitudes, the sky no longer looks blue due to the absence of gases. All in all, we can say with certainty - if it was not for the waters above, we wouldn't see any colors in the sky at all, but only a black background. No inspiring blue tones, no ambient light, no evenings and mornings nor sunrises and sunsets as we know them; only a bright, white lamp moving across a pitch black sky, day in day out.
There is hardly anyone in the world; regardless of their stance to creationism, of their religion, and of their convictions in general; who wouldn't appreciate all the different colors displayed in sky, at different times of the day, in different seasons, and at different latitudes. But how many are aware of the fact that all of it is the result of the division of the waters mentioned in Genesis 1 : 6 – 7?