How to have tail -f show colored output

I'd like to be able to tail the output of a server log file that has messages like: INFO SEVERE etc, and if it's SEVERE, show the line in red; if it's INFO, in green. What kind of alias can I setup for a tail command that would help me do this?

[takets]

multitailの使いかたサンプル

[kiyo_hiko]

"Try out multitail."、"grc, the generic colouriser is pretty cool"、Perl、Awk