solve this riddle!?

[ryry2595]

i am above all and not below a thing, i oversee things that human eyes wont, people look at me and see me blue, the only thing i cant do is poo.
What am i?

ok i made this myself so tell me wat u think. try to solve it.

 

[mia love hearts x]

the sky.
its stupidly easy.

unless thats not the answer..! lol
x

 

[Laura]

ya'll are saying the sky, but how does a sky poo?

 

[?Silent Assassin?]

sky. too easy

 

[Powerpuff girls]

Yep, the sky.

 

[Nik]

maybe sky but how do u poo rain is like pee