What is the title of the civil war movie where they sing shades of blue and grey?

The title of the civil war movie you're referring to is "Gettysburg." In the film, the song "Shades of Blue and Gray" is featured, highlighting the emotional struggles and experiences of soldiers during the Civil War. The movie, released in 1993, is based on the Battle of Gettysburg and focuses on the events and key figures involved in this pivotal conflict.