I love adding a splash of color in the web against the black background. This same effect can be done with white or any color combination you like. I happened to have black on hand. I considered adding sparkles to the spider, but the multi-colored body won out.
Warning: If you do serve your children black frosting, don’t be surprised when their mouths turn into Night of the Living Dead. They can’t help getting it all over their lips (if they’re anything like mine) and the black coloring turns their teeth into a look of decay. No worries, a toothbrush corrects the problem.