Hard-boil the eggs
Let the eggs cool completely
Gather food coloring, vinegar, water, cups, and spoons
Fill each cup with 1/2 cup hot water
Add 1 teaspoon vinegar to each cup
Add 10 to 20 drops of food coloring to each cup
Stir each dye solution well
Dip each egg into the dye
Leave the egg in the dye until the color reaches the desired shade
Remove the egg with a spoon or tongs
Place the egg on a paper towel or egg rack
Let the egg dry completely
Repeat with different colors if desired
Refrigerate the eggs after dyeing if they will be eaten