Blue is considered to be a friendly energetic puppy. She acts like a human and leaves her pawprint around the house. She will even leave her pawprint in some skidoo segments. Blue cannot talk but can bark, which everyone understands. Blue was first introduced when she skidooed out of her own storybook which was called About a Puppy. When Blue skidoos, she turns in a circle and jumps. Blue is seen skidooing onscreen but on some episodes, she skidoos offscreen.
Blue is a blue puppy with darker blue spots and a dark blue nose. Her eyes are white with black pupils. When Blue opens her mouth, her tongue is pink. She has big, floppy ears.
- Blue was conceived in a tall building in New York City in Times Square by three college graduates.
- Blue was originally going to be a male cat and was going to be orange. But the creators decided that orange was not good so they decided to name the character Mr. Blue and give him a blue color. But Nick Jr. already had a show with a cat, and then a female dog was conceived.
- The voice for Blue is one of the creators. The creators did not have the money to hire a professional voice actor so they sat in a conference room and asked the people sitting around asking who can bark and when it was the creators turn, she got the part.
- Her birthday is June 14, which is the date when of the episode "Blue's Big Birthday" (which featured her birthday) aired, back in 1998.
- Oddly enough this episode's remake for Blue's Clues & You! aired on February 7, 2020.
- When Blue and the rest of the characters were being created, the creators were stuck in a small room making the show and it's characters and never went out of the room. They never went out, so food was slipped under the door.
- Blue has been a clue four times.
- The first time in "What Is Blue Trying to Do?" (as the third clue)
- The second time in "Weight and Balance" (as the first clue)
- The third time in "Magenta Gets Glasses" (as the third clue [again])
- And the fourth time in "Mr. Salt and Mrs. Pepper Day" (as the second clue)