Rayleigh scattering.
Because the sky is blue to us by the light being scattered through nitrogen. In space there is no nitrogen for the light to scatter through, therefore the sky around them seems black. Although, when in space if you look at the earth, you can see the blue sky, as there is nitrogen there.
sky blue , black
blue
its white.. but the sky reflects the ocean wich makes it blue (the sky is blue)
1. Outer space contains virtually no gas/dust to scatter light. Outer space is black. 2. The sky is blue because that's the colour of air (mostly nitrogen), which is not totally colourless. You can see this effect looking at distant (10 km-plus) mountains. They have a blue tinge (caused by the intervening air between you and the mountains) known as atmospheric perspective. 3. If the sky's colour was due reflection from the oceans, then it would be white above Antarctica, which is snowy white. 4. If the ocean was blue because it reflects the sky, why does it still look blue-ish when under a totally clouded-over sky? The ocean is blue for the same reason the sky is blue: the sky is blue 'cause that's the colour of air, the sea is blue 'cause that's the colour of water.
On the moon the sky will look blue.
To an astronaut in a space craft, the sky appears to be black.
Stars twinkle due to the scattering effect of earth's atmosphere. In space this is no atmosphere, thus they do not twinkle. The sky is black in space because there is no scattering of light as there is in the atmosphere. The earth appears blue from space due to the color of the gases in the atmosphere, and their reflected light on large bodies of water.
At night darkness emerges for which the sky seems to be black, though originally it is blue. The color blue is visible with the onset of dawn.
Mix a few more shades of sky blue or try adding a tinge of black.
The colors you mix with sky blue to get navy blue would be a dark blue or a black. These will make a navy blue.
As one gets above Earth's atmosphere, the sky transitions from a gradient of blue to black due to the scattering of sunlight by the atmosphere. Beyond the atmosphere, the sky appears completely black as there is no atmosphere to scatter sunlight, revealing the vast darkness of space.