Complex sentence: So, during both of his stints as Washington's head coach, Gibbs started the tradition of having the Redskins wear white uniforms over burgundy pants for home games, which is considered to be the team's "classic" look.
Split into simpler sentences: So, during both of his stints as Washington's head coach, Gibbs started the tradition of having the Redskins wear white uniforms over burgundy pants for home games. This uniform combination is considered to be the team's "classic" look.