to show you true colors
This idiom means "to reveal your real character"
The grass is always greener on the other side.
Thinking what others have is better than what you have even if it isn't true. / Being envious of what others have
red tape
This idiom means "lots of documents, unnecessary bureaucracy"
black sheep
someone who doesn't fit in/ being different from others
black market
Illeagl transaction/sale
green with envy
jealous
White lie
a small lie/ a lie that seems small
Caught red handed
found while doing something wrong
blue blood
meaning: royalty, someone related to royalty
Once in a blue moon
something that rarely happens
pot calling the kettle black
This idiom means: to criticize someone while having that same fault yourself
black and blue
beat up/ very hurt
a golden handshake
A payment given to someone who is laid off or retires early.
to be in the red
This idiom means "to owe money"
to feel blue
This idiom means "to feel sad"