Blue laws were strict regulations that prohibited certain activities, such as working or drinking alcohol, on Sundays.

The ship raised the blue Peter to signal its departure.

I found a beautiful blue point on the shell of a small oyster.

She proudly wore a blue ribbon on her dress.

She wore a stunning blue-black dress to the party.

She comes from a blue-blooded family.

Investing in blue-chip stocks is a safe long-term strategy.

I used a blue-pencil to make corrections on the manuscript.

I ordered the blue-plate special, which included a delicious combination of meat and vegetables on one dish.

She won a blue-ribbon at the competition.