as red as a cherry

- bright red

The car was as red as a cherry after its new paint job.

as red as a poppy

- bright red

The mark on my arm was as red as a poppy.

as red as a rose

- intensely red

The morning sunrise was as red as a rose.

as red as a ruby

- deep red

The office assistant was wearing lipstick that was as red as a ruby.

as red as blood

- deep red

The stain on the carpet was as red as blood.

catch (someone) red-handed

- to catch someone in the middle of doing something wrong

The woman was caught red-handed when she tried to steal some cosmetics.

ears are red

- one's ears are red from embarrassment

My ears were red after hearing what the teacher said about me.

in the red

- to be in debt, to be unprofitable

The company has been in the red for three years now.

like waving a red flag in front of a bull

- what you are doing will definitely make someone angry or upset

Talking about the city mayor with my father is like waving a red flag in front of a bull. He does not like the city mayor.

out of the red

- out of debt

Our company is finally out of the red and we are now making money.

paint the town red

- to go out and party and have a good time

When my cousin came to visit us we decided to go out and paint the town red.

red-carpet treatment

- to receive special/royal treatment

I always receive the red-carpet treatment when I go and visit my aunt.

red-eye

- an airplane flight that leaves late at night and arrives early in the morning

We caught the red-eye flight last night and we are very tired today.

a red flag

- a signal that something is not working properly or correctly

The fallen trees along the road raised a red flag for the safety inspectors.

red herring

- an unimportant matter that draws attention away from the main subject

Talking about the other issue was a red herring and did not do anything to deal with today's problem.

red-hot

- very hot, creating much excitement or demand

The new video game is red-hot and many people are waiting to buy one.

red in the face

- embarrassed

I became red in the face when the teacher began talking about me.

red-letter day

- a day that is memorable because of some important event

It was a red-letter day when my sister received her graduation diploma.

red tape

- excessive formalities in official business

Many businesses complain about the red tape that they must deal with in order to get anything done with the government.

roll out the red carpet

- to greet a person with great respect, to give a big welcome to someone

The government rolled out the red carpet when the politician came to visit.

see red

- to become very angry

My boss saw red when I told him that I would not be coming to work today.