The blue colour of sky has nothing to do with colour of the ocean, it is blue due to...
If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...
Weather Underground11d
It Takes The Entire Rainbow Of Colors To Make The Sky Blue. Here's Why.
Wildfire smoke that turns the sky a hazy orange. In this case, smoke particles act as a catalyst that changes the way light scatters. That can leave us seeing less blue and more orange ...