How to display added gems in color?

Hi,

When I install a new gem with bundler, I'd like to show the installed gems in a different color
ex.
...
Using diff-lcs (1.1.3)                           <-- white
Installing factory_girl (4.1.0)                <-- white but a green color for example would be more visualy appealing
Installing factory_girl_rails (4.1.0)        <-- white but a green color for example would be more visualy appealing
...

since the line "Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed." is already green, I suppose it's not a big task to do. Is it possible to do it?

Thanks