Originally Posted by rollin

The green is the points jersey. Points are given at intermediate sprint point and end of stages.

Polka dots are the "King of the Mountain" jersey. In effect goes to the best climber. Points awarded at tops of climbs. Steeper the climb the more points.

Also:

White - best young rider (under 25)

Rainbow jersey - World Champions have the right to wear the rainbow on their kit if they are world champion in the discipline being ridden.

If the Yellow holds more than one race jersey the others are passed down to next best.

Enjoy.
Country Champions jerseys - same as rainbow.