The star of Blue's Clues, Blue, is a girl puppy who communicates to Steve and Joe through barks, which they understand. Every episode, she initiates a game of Blue's Clues in which she leaves three paw print clues for Steve or Joe and the viewer to find the answer to a question.
Blue is a blue puppy with darker blue spots and a dark blue nose. Her eyes are white with black pupils; her tongue is pink if she licks anything. She has big, floppy ears.
Blue appears in every episode of both Blue's Clues and Blue's Room, totaling 160 overall. She first appeared in an aired episode titled Snack Time, though she appeared in the unaired pilot, Blue Prints as well. She last appeared in an episode of Blue's Clues titled Bluestock, and her final appeared Blue's Room episode was in Music Stars.