Periwinkle (or simply Peri) is a kitten from the city who first appears in the third season episode "Blue's Big Mystery." He becomes a recurring friend of Blue afterwards.
Periwinkle loves to do magic tricks, put on shows, build forts and do things on a grand scale. He's very outgoing and likes to collect things. Periwinkle talks and is considered a male cat. Among his favorite hobbies is being mischievous and practicing magic. Periwinkle is friends with Plum, a purple bird that lives in the same city he lived in before moving to Blue's neighborhood. Steve and Joe often call him Peri. His favorite color is red which is proven in "Blue Takes You to School".
Periwinkle is an easily excited and sneaky kitten who came from the city. He recently moved into Blue's neighborhood and met many new people in the new environment in Season 3. He goes to school with Blue, Magenta, and many other children. The character enjoys playing with others and practicing magic tricks.
Periwinkle is a lilac tabby kitten, a light shade of periwinkle with purple triangles on his forehead. He has triangles on his back, triangle shaped ears and a pink nose. Periwinkle has a long tail and four legs; his feet have no visible toes. His right front foot is periwinkle and the other feet aren't.
In "Blue's Big Musical", Periwinkle thought the group inside the house were doing a magic show when they were really doing a music show. But because the Blue's Clues group needed more time to get ready backstage, Periwinkle did his magic show to entertain the audience.
Sidetable tells Periwinkle that she wanted to sing in the show but never told Steve she wanted to. While Periwinkle had a similar response, Steve never got to see any of his magic tricks.
He only appeared in only a few episodes with Sidetable Drawer saying "Blue's Clues, I'm so excited" because most episodes with Sidetable Drawer saying "Blue's Clues, I'm so excited" were before Periwinkle's debut.
His owner was never introduced.
So far, it is still unknown if Periwinkle will return in "Blue's Clues & You!" However, his house can be seen in the background in the extended version of the theme song.