The problem i see with this, is depending on layout, that players will avoid the other teams markers, and it could keep the action down to a minimum.
what i did was make the tops of all the encounters bright orange, but the underside either green, white, blue, or red.
Depending on the scenario players would need to search the objective, looking for whatever plot device i have out there, perhaps they need 1 of each color, representing clues, or parts of a map etc,
or perhaps they are ONLY seeking their specific color, this keeps players running around, searching, interacting, racing for encounters....