The Chevrolet Cobalt's color availability varied by model year and trim level. There's no single definitive list, as Chevrolet offered many colors over the car's production run (2005-2010). To find the exact colors available for a specific year and trim, you'd need to consult a brochure from that year or a resource like Edmunds or Kelley Blue Book that shows specifications for used models of that year.
Some common colors offered across various years likely included various shades of:
* Black
* Silver/Gray
* White
* Blue
* Red
But there were likely also other less common colors and metallic finishes available.