Things that are blue with U

• Umbrella

  Often pictured as bright blue rain gear.

• Underwater

  Oceans and seas look blue underwater.

• uniform

  School or work clothes often dark or navy blue.

• unicorn

  Fantasy horse often drawn with blue or mane blue.

• Under the sea

  Song phrase; seas are classically shown as blue.

• Urchin
• Ultramarine

  Name of a deep vivid blue pigment.

• Uruguay flag

  Flag has a light blue stripe, fits the theme

• Undersea

  Undersea scenes famously deep blue water

• United States flag

  The United States flag famously includes blue 🇺🇸

• up in the sky

  Sky is one of the most classic blue things

• USA flag

  The USA flag includes a bold blue field of stars 🇺🇸

• umbrella that is blue

  Umbrellas are often vividly blue, common sight

The words in the list Things that are blue with U come from players of the word game Categories game.