Gather hard-boiled eggs, food coloring, white vinegar, water, cups or bowls, and a spoon or tongs
Fill each cup or bowl with 1/2 cup hot water
Add 1 teaspoon white vinegar to each cup or bowl
Add 10 to 20 drops of food coloring to each cup or bowl
Stir the mixture until the color is evenly mixed
Place one egg into each cup or bowl
Let the egg sit until the desired color is reached
Remove the egg with a spoon or tongs
Place the egg on a paper towel or drying rack
Let the egg dry completely
Repeat with different colors as needed
Refrigerate dyed eggs if they will be eaten later