Complex sentence: The team has also previously used white away uniforms with red stripes; white and red are the colors of the flag of Washington, D.C., and the stripes are also reminiscent of those used on the flag.
Split into simpler sentences: The team has also previously used white away uniforms with red stripes. White and red are the colors of the flag of Washington, D.C., and the stripes are also reminiscent of those used on the flag.