For the ultimate food colors, check out the following links:
https://www.mccormick.com/food-coloring-guide
https://www.mccormick.com/articles/mccormick/how-to-dye-easter-eggs
https://www.mccormick.com/articles/mccormick/how-to-dye-easter-eggs
https://www.mccormick.com/articles/mccormick/how-to-dye-easter-eggs
https://www.mccormick.com/easter-egg-color-wheel