Blue

a bolt from the blue

between the devil and the deep blue sea

Blue and green should never be seen unless there’s something in between

blue fear

blue funk

blue rinse brigade

boys in blue

clear blue sky

I need a match for this blue paint

It was like a bolt from the blue

like a bolt from the blue

My daughter would scream/cry blue / bloody [Am.] murder if you tried to put her to bed

once in a blue moon

out of the blue

something old, something new, something borrowed, something blue