Unicorn is a cheery yellow cream. It looks pastel in the bottle, but dries a bit more bright on the nail. Overall, I really like this color. The downside is that the formula is pure crap. Even after 3 thick coats, still streaky. These photos were 4 thick coats, no topcoat.
Feel free to let me know if you have come across any yellows that have a formula that's nice to work with! I am always on the lookout for an easy yellow :)