I'm with ironraven. While they are retina burning to the point of causing nausea, they will also be super easy to find. Even in an adrenaline pumping survival situation. Drop one of those knives and you won't have any problem finding it. Need someone else to find and bring it to you? Easy: "Get my knife. It is on the blue backpack over there. Orange and green. Go!"
I've never understood emergency equipment or survival gear that was camo/flat black/OD or other such colors. I'm not in the military (anymore), potentially operating in hostile territory where camouflage and concealment is required. It is emergency or survival gear, getting noticed is good.
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