Highlighting matches in Vim over an inverted pattern

Question

How may I highlight in Vim with the :match command the text that does not matches with the given pattern?

So, I want the opposite of:

:match myGroup /foo/

Answer 1

Well, you could do something like:

:match myBaseHighlight /foo/
:2match myGroup /./

where myBaseHighlight is defined to be your default appearance -- white on black, or whatever. :match will override :2match, so everything other than /foo/ will get the myGroup highlight.