Few questions about colors and regex

[Marco Giusti]

Hello, I have a few question about the use of color. Starting with the
simpler:

- can I use `underline` with color? I think not, I tried but I failed
  but I also found on Internet some config files with this
  configuration;

- does exist a non greedy version of * (0 or more) in mutt's regexp (In
  vim is \{-})? I'd like to highlight *bla bla* but not *this*
                                                                                
                ^^^^^^^
                                                                        this 
should be not highlighted

  This is what I have actually:

  color body brightdefault default \
  "(^| )\\*([-a-z0-9*]+\\*|[-a-z0-9*][-a-z0-9* ]*[-a-z0-9*]+)\\*[[:punct:]]?( 
|$)"

- can I `highligh` only the header name and not the full header? i.e.:
  Subject: blablabla
  ^^^^^^^^

thanks
m.