This bath bomb smells really fruity (citrus-y?). The outer shell is yellow but it has a surprise blue-color filling that fizzes (think of those fizzy crystal candies that pops in your mouth). It was a comforting and fun experience, I ended up sitting in the bath tub for 2 hours (!!!) while watching Running Man. I only give four stars because I'm sure there are more extravagantly colored & scented LUSH bath bombs out there that deserves five stars.