Perhaps the most widely known way to dye Easter eggs naturally is to use onion skins. Not only red skins, but yellow skins will also dye your eggs in striking colors. For a basic onion dye used to color 12 eggs, peel 12 onions and place the peels in a large saucepan. Cover them with water and add 3 tablespoons of white vinegar. Bring the mixture to a boil, and then allow it to simmer for 30 minutes. Once it has simmered, cool to lukewarm. After cooling, strain it and use the resulting liquid to dye your eggs. Red skins will give white eggs a lavender or red color, and brown eggs will turn to a beautiful deep, chocolaty brown. Yellow onion skins will turn white eggs an orange color, and brown eggs to red brown.