Welcome to putrefaction. This is when the famous green color of death comes into its own. It’s more of a greenish-brown, actually. With some turquoise. You could call this color “putrid,” and you’d be totally correct. The green-purple-turquoise blossoms of putrefaction are caused by bacteria. Remember when I said that even after you die there are still fun things happening inside your flesh case? Well, bacteria are the most important guests at the party. Gut bacteria go wild, digesting you from the inside.