I want to share one of the cool features which iTerm.app has - triggers. The idea behind triggers is simple - it allows to perform arbitrary action based on the output in console window. For example, it can colorize specified content (based on regular expressions).
Start iTerm, open settings (⌘+,), go to Profiles, then tab Advanced.
Click on Edit button in Triggers section.

Then you can define your own triggers:

Example output:

Happy coding!