The sky isn't actually blue - it just looks blue because air actually has a color. From close up, it's a very small color, so you can't really see the color. But when you're looking wayyyy up there, you're looking at the light from a LOT of air, and then you can see the blue.

I think the ocean is blue for the same reason - water has a color. That's why when you see tap water, it's whitish and transparent. Then when it's in a giant pool, it's blue.

It's like if take a really thin paper, it's almost transparent. But then you layer another... and another... and another peice on top, then you can see the color better. It gets darker, pretty much.


Yeah. I read that in a book