It was the soft blue cloud of everything I didn't know and hadn't ever done.

Presently from the automobile drifted a blue cloud of smoke.

But the light was bad under the thick blue clouds, and it was hard to tell.

Sometimes gray, but blue if there aren't clouds and it is day.

In his mind's eye he saw a pale blue cloud floating toward him.

Finally he blew a blue cloud toward the ceiling.

Colonel Vincent came down the line, trailing aides like blue clouds.

The bowl bobbed off through harsh blue clouds it had made.

He was silent again, brooding in the blue clouds of tobacco smoke.

Smoke still hung in a flat blue cloud halfway to the ceiling.