Quote:
Originally Posted by
Loathing 
I would not say
that a blue blazer
with brass buttons
is a particularly
casual piece
of clothing;
it is more formal
than many a
lounge suit.
If you would like
a casual blue blazer
I would suggest
you avoid brass
buttons.
That's fair enough, but I wouldn't wear one with brass buttons in anything BUT a casual setting. For instance, I can think of no navy lounge suit that would be less formal (or shall we say, less business appropriate?) than a navy blazer. Maybe this is a difference in preferences based on our countries of origin (I am originally from the U.S.). Blazers, in my mind, are for leisurely boating, drinks with friends, a casual dinner, etc.