completion: highlight matching part

Hi,

is it possible for zsh to highlight (bold, change color etc.) of
matching part of available completions? E.g.

$ ls abcd[tab]
abcd123		abcd456		abcd789
abcdefg		abcdhij		abcdklm

and I'd like the 'abcd' to be lightgreen.

Now it's sometimes hard to find out what character to type next, this
solution would make it easier.

--

-- 
Tomasz Pala <gotar <at> pld-linux.org>