There goes another punch line.

The Department of Homeland Security is planning to get rid of the color-coded terrorism alert system. Known officially as the Homeland Security Advisory System, the five-color scheme was introduced by the Bush administration in March 2002.

Red, the highest level, meant “severe risk of terrorist attacks.” The lowest level, green, meant “low risk of terrorist attacks.” Between those were blue (guarded risk), yellow (significant) and orange (high).

The nation has generally lived in the yellow and orange range. The threat level has never been green, or even blue.

In an interview on “The Daily Show” last year, the homeland security chief, Janet Napolitano, said the department was “revisiting the whole issue of color codes and schemes as to whether, you know, these things really communicate anything to the American people any more.”