Yes, for 59 years in a row from 1891 to 1950.
So if people talk about a "traditional Southampton kit", what about these new black shorts that we started using after the club had already existed for 65 years. Black shorts for Southampton Football Club in 1950 were completely new, a Saints Web Forum in 1950 would have imploded over the change from blue shorts to black!
If Saints wear an all red it for the next 65 years that will over time become the "traditional Southampton kit" and any change in 2078 to the kit will be met with "it isn't our traditional kit".