Depending on what kind of pickles you’re using, you can drastically impact the color of your eggs. These would make for some seriously lovely deviled eggs if you pickled them in a variety of pickle brines. Very bold colors will do the best dye jobs, unsurprisingly, but lighter brines can create a pretty palette of subtle colors as well. Longer soak times will yield more acidic pickled eggs and a deeper hue that soaks through, sometimes even through to the yolk which can give it an unpleasant color, depending on your perspective.
Check out all the different ways to pickle your eggs here: http://phickle.com/decorative-pickled-eggs/