Giving eggs a quick rub with diluted vinegar can help make the dye stick by clearing away a thin layer of oil and other debris on the shell. Adding vinegar to your natural dyes as well can help make them stick.
For darker eggs, you can add more of the plant you are using to create your dyes. Double the ingredients with the exception of water and vinegar. For lighter eggs, water down your egg dyes — but be careful to not overly dilute them.
- Brown - Red and pink - Yellow - Green - Orange - Purple - Blue