Lichen or Finger paint?

This week i spent about five minuets a day roaming the woods in search of more blue lichen. My concern is that children to frequent the area and what i think is lichen could be finger paint! At our fearless leaders behest i researched images of lichen fruiting bodies and could not locate an image that was quite the color of my supposed lichen. this is the closest i could find:

Lichen videos, photos and facts - Fulgensia fulgida - ARKive

Here is a closeup image of the lichen in question. you be the judge.