Soak the hard boiled egg for a few minutes in vinegar to ready the shell to take up as much dye as possible. Wrap the egg in a paper towel securing it with a twist tie.
Put a few drops of food coloring randomly on the paper towel.
Spritz with a spray bottle set on mist to make the colors bleed.
Leaving the eggs in the paper towel, set them in front of a fan until the towel is dry.
Open them up and if they aren't completely dry leave them in front of the fan for a few more minutes.
These turned out stunning!
They have a sort of night time, celestial sky look to them.