You bet! If you have a steady hand and cut very thin slices of olive or red onion, you could make spider web deviled eggs to go with your spider theme. Another option is to add more paprika or a few drops of red food coloring to the yolk mixture to turn it orange. Spoon back into the egg whites to make little pumpkins, then add a tiny piece of black olive or a small slice of a chive on top for the stem.