Lily and Blue Kangaroo share everything, even birthdays. And for her next one, Lily has decided that everything must be pink: pink invitations, pink party clothes, pink wrapping paper...Even Blue Kangaroo gets a pink ribbon to wear.

He isn't sure that he likes it, and once everyone starts to arrive, all dressed in pink and carrying pink presents, he thinks that Lily would prefer him if he were pink.

He gets so miserable, that he creeps away. But Lily misses him, and comes to find him. "I love blue, and I love you!" she says, and she changes into a completely blue outfit, to show him she means it.