Origin of term 'deep blues'

Subject: Origin of term 'deep blues'
From: GUEST,Pseudonymous
Date: 03 Jul 19 - 06:13 PM

I was wondering who if anybody coined the expression 'deep blues'. I seem to recall coming across it as the title of a book.

Subject: RE: Origin of term 'deep blues'
From: GUEST,keberoxu
Date: 03 Jul 19 - 06:17 PM

. . . as opposed to Deep Purple . . .