Red wearing sports teams win more. Here's a few studies. Maybe if you normally wear red and on occasion wear black it hypes up the the team?
http://www.canadafreepress.com/index.-win-at-sports
http://www.mwcconnection.com/2011/6/.orms-often-win
http://news.nationalgeographic.com/n.redsports.html
http://www.telegraph.co.uk/science/s.-win-more.html