How much silver do you lose on knockout in yellow zones?
Also... if you get killed in a red zone do you lose your gold too???
You don't lose any silver. You lose 5% durability on all equippable items. A part of the money that's lost this way is dropped on the ground and can be picked up.
If you die in PvP your gear takes 30-50% durability damage and can be looted by other players. Some of the items may trash.