black and white look like dead and life...

@Leonard: Yellow helmets? :D I always thought yellow meant "danger" so I don't think that's such a good idea. :P And on wikipedia it states: "Yellow is associated at times with jealousy, as well as cowardliness." I don't know if we really want a peacekeeping force associated with cowardliness. :D

Blue is my favorite. Blue is the color of stability, as the ocean and sky which seem to stretch on forever. It's the color of thinkers and that of quiet wisdom.

Red. It's a very vivid color and easily distinguishable. (Which is why many flags have red in them.)

blue ..why? because the meaning of blue: good fortune, communication, wisdom, protection, spiritual inspiration, calmness, reassurance, gentleness,