Yeah, that's pretty common among all the sports, though. Blue and red are just very accessible colors, I guess.
For the hell of it (and because I'm kneeling out the clock here at work
) I ran threw a few leagues and just quickly looked at all the teams, and picked the first color that comes to mind when I think of that team's uniforms.
I did the NFL, MLB, NHL, and EPL
NFL
RED - 6
PURPLE - 2
BLUE - 14
ORANGE - 3
GREEN - 3
BLACK - 4
20/32 Blue or Red - 62.5%
MLB
ORANGE - 3
RED - 10
BLACK - 2
BLUE - 13
GREEN - 1
PURPLE - 1
BLACK - 1
23/30 Blue or Red - 76.67%
NHL
BLACK - 4
RED - 10
BLUE - 12
GREEN - 2
YELLOW - 2
ORANGE - 1
22/31 Blue or Red - 70.96%
EPL
BLUE - 6
RED - 10
WHITE - 1
YELLOW - 1
BLACK - 1
ORANGE - 1
16/20 Blue or Red - 80%