There is a movie based on the "Battle of Alcatraz" which was a prison escape attempt that happen in 1946, it is NOT "Brute Force". This movies was in color, and it was about the exact attempt of the escape from Alcatraz. I'm not talking about Escape From Alcatraz either. I've seen this movie a few decades a go when I just a teenager but haven't had any luck finding this movie. Please help me! Thank you!

One of these? Battle of Alcatraz - film depictions

That's a pretty rude response to someone who is just trying to help, I won't be making any other suggestions. Good luck finding your movie.