One of the most common veggies used as dye, beets produce a deep pink (almost red) hue. Blend 1/4 cup of cooked beets with 1/2 cup beet juice. Strain out any large pieces, then save the remaining liquid to use as food coloring for your next red velvet cake.
“Orange” you glad you can use carrots instead of processed food coloring? Except your final result will be more yellow than orange, most likely. Put raw carrots through a juicer to create your dye (you may need to add some water to thin out the liquid). It’s perfect for one of these magical unicorn recipes.