Sayings:
* "Feeling blue": This means feeling sad or depressed.
* "Out of the blue": This means something happened unexpectedly or without warning.
* "Once in a blue moon": This means something that happens very rarely.
* "Blue-chip stock": This refers to a stock considered to be a safe and reliable investment.
* "The blues": This refers to a type of music that is often associated with sadness or melancholy.
Things:
* The Blue Man Group: A performance art group known for their blue-painted faces.
* Blue Monday: This is a term for the most depressing day of the week, often considered to be the first Monday after Christmas.
* Blue Ribbon: A prestigious award, often associated with quality or excellence.
* Blue Blood: This refers to someone of noble birth, often considered to be of a higher social class.
* Blue Screen of Death: A blue screen error message displayed on Windows computers, indicating a system crash.
* Bluebeard: A character from a famous fairy tale, known for his blue beard.
Other:
* Blue whales: The largest animals on Earth, named for their blue-grey color.
* The Blue Lagoon: A geothermal spa in Iceland, known for its milky blue water.
* Blue cheese: A type of cheese with blue veins, known for its strong flavor.
This is just a small selection of examples. There are many other famous sayings and things that contain the word "blue."