Above is Unknown

We have no specific word for what is above us outside.
When I look up I see a,
well, I'm not sure of what I see.
Maybe it's a color babies would wear.
Something that looks like a cotton ball at times.
Maybe there's a color that has an unknown name I could use.
Since it's unknown, maybe I could say that there is deepness.
A deepness of a sometimes pale but dark color.
The white expanse of puffiness, just dying to be poked,
but too far up to be prodded.
Let's leave the unknown in the sky unknown.
Imagine each his own.