In a large bowl of water, add blue food coloring enough to turn the water a dark blue.
Lightly tap each egg on all sides to crack (but not break off) shells and then submerge in the water. For best results leave them to soak overnight, but lines will show up after a few hours.
Peel eggs and rinse, then cut in half and remove yolks.
Add yolks to a bowl with green food coloring, mayonnaise, and Dijon mustard, mixing thoroughly.
Add yolk mixture back into whites, and top with a sprinkle of Chicken Lick’n.