Blue replaced brown on Padres uniforms in 1991, by FriarWire
The Padres change uniforms, again, so let's look at their visual history
Padres uniforms: Visual history of brown, yellow, blue, orange, sand - The San Diego Union-Tribune
Padres uniforms: Visual history of brown, yellow, blue, orange, sand - The San Diego Union-Tribune
Throwback uniform - Wikipedia
MLB Jersey & Cap History
A Beautiful Brown Padres Uniform Redesign, LobShots
The Padres change uniforms, again, so let's look at their visual history
Bruce Bochy leads 3rd franchise to World Series