Expressions and Idioms with Color

Expressions with colors.  How many do you know?

• Green with envy  (jealous or envious of someone)
"I was green with envy when my coworker was promoted."

• Feeling blue 😥 (Sad)
"I'm feeling blue because my friend moved away."

• Out of the blue  (happens suddenly or unexpectedly)
"The announcement came out of the blue."

• Once in a blue moon 🌚🌛(rarely happens)
"I only see her once in a blue moon."

• A gray area (something is not clear; uncertain)
"The rules for airspace and flying drones is a gray area."

• A golden opportunity 🌟👑  (a great or rewarding opportunity)
"Winning the scholarship was a golden opportunity for her to attend her dream university."

• Caught red-handed  (caught doing something you weren't supposed to do).
"I was caught red-handed eating cookies before dinner."
"The police caught the thief red-handed in the jewelry store."