Where does the saying "out of the blue" come from?

Question

Where does the saying "out of the blue" come from?

Answer 1

Probably someone who worked outside a lot. Since the sky is endless, it came out of the endless blue. Out of the blue.

Answer 2

I would guess it comes from sailors.

Like out of the blue of the ocean they suddenly spotted land or a mermaid or whatever.

Make sense?

Answer 3

a lightning bolt coming from our clear blue sky - literally.

Answer 4

It means out of the clear blue sky, like out of nowhere.

Answer 5

In ancient times a woman's reproductive organs had a blueish color to them.  The expression "Out of the Blue" was referring to the birth of a child, as they would emerge from the blue.

Answer 6

Originally it had to do with the strange things that can grow in cheese, if it is left to sit in very warm, moist conditions as it ages beyond edibility.  It use to be "out of the bleu".

Answer 7

It derives from an older phrase. "Dropping out of the clear blue sky" The meanings are simmilar