How can "red"be used as idiom?

"Seeing red" is a common idiom that means to become extremely angry or enraged.

1. Red Flag:
- A sign or warning of potential danger or trouble.
- Example: "The job offer had a few red flags that made me hesitant."

2. Red Carpet Treatment:
- Exceptional attention and luxury given to a VIP or special guest.
- Example: "The celebrities received red carpet treatment at the awards ceremony."

3. Red Herring:
- A distraction or false lead that misleads.
- Example: "The politician used a red herring to avoid answering the question."

4. Red-Handed:
- Caught in the act of doing something wrong or illegal.
- Example: "The thief was caught red-handed stealing the jewels."

5. Red-Faced:
- Embarrassed or ashamed.
- Example: "The student was red-faced after failing the test."

6. Red Letter Day:
- A special or memorable day.
- Example: "Graduation was a red letter day for all the students."

7. See Red:
- To become extremely angry.
- Example: "The driver saw red when another car cut them off."

8. Roll Out the Red Carpet:
- To give a warm and welcoming reception.
- Example: "The company will roll out the red carpet for the new CEO."

9. Red Tape:
- Excessive bureaucracy or unnecessary regulations.
- Example: "Dealing with red tape made it difficult to get the project approved."

10. Paint the Town Red:
- To have a wild and extravagant night out.
- Example: "The group of friends went out to paint the town red."