what is the real color of the sky? Depends on your point of view! If I take a glass jar filled with air, it would look pretty clear and colorless. In fact the gasses that make up our atmosphere (almost all nitrogen and oxygen) are classified as "colorless" in chemistry reference books. Air transmits visible light almost completely. But nothing is *completely* transparent. If you shine white light through many miles of air (like sunlight in our atmosphere), you will notice that the air tends to scatter the bluer wavelengths and transmit the redder wavelengths. That's why the sky appears blue; it's scattering the blue portions of the sunlight.So perhaps I should sum this all up by saying that the sky really is blue, but the air is nearly colorless. Hopefully my explanation isn't too confusing. If this answer leaves you with more questions, please don't hesitate to ask them!