Nice suggestion. Although I can't seem where one would have to look for those "pretty colours" you mentioned, I certainly can't see any of them on my Mac terminal...
http://i.imgur.com/BjWj7h6.png
FWIW, I have:
COLORTERM=gnome-terminal
TERM=screen
and Debian takes care of my termcap etc, afaik.http://i.imgur.com/0Hzze9G.png
Thats me on osx running tmux with TERM=xterm-256color.