Question: What Is the True Colour of the Sky?

Leigh Kesler answered on 6 Mar 2019:

Color (excuse my American spelling) is simply how our eyes interpret different kinds of light. When we see an object that is blue, for example, it appears blue because it is absorbing all of the light that isn’t blue, and reflecting blue light back to our eyes. The sky appears blue for reasons that are a bit more complicated. The light coming from the sun scatters off of the air molecules, and the blue/violet light scatters more than the other colors. The sun also produces more blue light than violet light, so we see a blue sky most of the time. As to the *true* color of the sky, I would say it has no color as it is just colorless gases.