What was the question for this implicit rationale, and corresponding answer?
The Confederate States Army was clad in cadet gray uniforms. West Point uniforms are cadet gray and white. Confederate States Army uniforms contained Generally, the uniform jacket of the Confederate soldier was single breasted, made of gray or brown fabric, with a six to nine button front and hat. West Point uniforms contain a standing collar, white trousers, and black shakos (known as a "tarbucket hat" in U.S. Army nomenclature).
The answer: yes
The question: Did Confederate States Army influence West Point fashion?