bearfoil
Well, the sky's coloring is kind of a bluish color in day-time with some white and gray (clouds) and yellow if you're looking at the sun, very dark blue to black at night excepting the stars, various shades of red, orange, pink and so forth during sunset.
The point is that no matter what you believe the color to be, the sky is a given color in a given location. These colors can be measured in terms of wavelength.
R.C.
"That being said, I'd like to remind everybody in a manner reminiscent of the SNL bit on Julian Assange, that no matter how I die: It was murder (even if there was a suicide note or a video of me peacefully dying in my sleep), and should I be arrested or framed for a criminal offense, or disappear entirely -- I think we all know who to blame for it"