What does the following sentence mean?
(What in the blue was that?)
Is it a formal sentence or not? Where exactly can I use it?
and s.th else. it seems that colors have lots of meanings. is there anywhere i can find various meanings of colors?
What in the blue was that?
What in the world was that?
What is the wild, blue yonder (i.e. the sky) was that?
If you do an on-line search, using the key words <meaning of colors> you might find that there is a great deal out there on the subject.
All the best.