Bama has worn alternate uniforms. I think they incorporated the houndstooth to honor Bear Bryant one game.
Has Alabama ever worn alternate uniforms?
"Yes, the University of Alabama has worn alternate uniforms at several points throughout the years. The team most notably began using alternate uniforms during the Nick Saban era in the late 2000s. These alternate uniforms typically feature a different design or color scheme than the standard crimson and white uniforms, sometimes incorporating black or grey colors.
For example, the team introduced an all-black uniform in 2015. Additionally, the team has worn throwback uniforms and custom uniforms for special events such as rivalry games, bowl games, and the College Football Playoff."