In an alternate reality, Colu is a planet located in the Milky Way Galaxy, the homeworld of a humanoid civilization known as the Coluans. By this reality's 30th century, Colu was allied with the United Planets.
As a natural adaptation, the Coluans were possessed of a superintellectual ability. Colu was the birthplace of Brainiac 5, a member of the Legion of Super-Heroes. (TOS - Legion of Super-Heroes comic: "Issue 1")
- The Legion's universe became crossed with the Star Trek universe due to a time distortion, so it is not clear if there is a Star Trek universe version of Colu as a counterpart to Brainiac 5's homeworld depicted in the Legion series.