I wonder if color-gender relationships are universal (international), e.g. blue is for boys, pink is for girls?  I just saw a non-American guy on a purple mountain bike.  He didn't seem to mind. 

Some internet research claims that blue and pink were actually reversed in their gender representation as recently as the 1940s or 50s.  Boys wore pink because it's essentially watered-down red, which is a fierce, bold, dramatic color.  Girls wore blue for some unknown reason. 

Wikipedia has a little information on the subject, noting that while purple is often associated with royalty in certain cultures, most Asian cultures have adopted yellow.  And while black is often a symbol of death in western cultures, the Chinese use the color white. 

Update (2007-08-21 9:09am):  A recent article talks about the same thing. #psychology