Grinch Green PAX Paint by Thom Surprenant
This is the exact color used on Jim Carrey in the Grinch movie. 2oz of PAX paint will cover at least 1 foam latex prosthtic, depending on how many layers you apply with a sponge wedge. PAX is an adhesive paint so it's preferred for prosthetics. You can also apply to skin, as it's skin safe but you'll need a remover to take it off, like Bond Off, Agent X, Super Solv or Pros-aide and PAX remover.