Today, we dyed eggs with natural, food based colors and had some really great results. I will admit, that some of them were woefully slow and not too eggciting in the color department, so I added a few drops of food coloring to take them up a notch. This is what we got, using Blackberries, red Cabbage, Spirulina, Paprika, and beets. Fill a 1/2 pint jar (or equivalent size cup) with the food stuffs, chopped up, pour boiling water over it, and let sit about 1/2 hour. Add 2 tbsp of vinegar. For Paprika (which was my fave color) used 2 TBSP Paprika, to 1/2 pint water + vinegar. For the Blackberry colors, smoosh them up.
Au natural takes longer, but the colors (especially on our already multi colored eggs) are beautiful!