Here are some examples
Red
I'm seeing red.
If you keep spending your money like this you will be soon in the red
Don't mention Tom's promotion to Mike. It would be like a red flag to a bull!
Blue
It came out of the blue!
I'm blue today
He's the director's blue-eyed boy!
Green
I'm green with envy.
We're ready to launch the campaign as soon as we get the green light.
Jake's garden is beautiful, he really does have green-fingers.
Red
I'm seeing red.
If you keep spending your money like this you will be soon in the red
Don't mention Tom's promotion to Mike. It would be like a red flag to a bull!
Blue
It came out of the blue!
I'm blue today
He's the director's blue-eyed boy!
Green
I'm green with envy.
We're ready to launch the campaign as soon as we get the green light.
Jake's garden is beautiful, he really does have green-fingers.
Black
I'm in a black mood today because he forgot my birthday.
He bought it in the black market
Last night, he blacked out