The bridesmaids wore beautiful Tiffany blue dresses.

I love the dark blues in this painting.

I love the light blues in this painting.

The workers installed the blue pipes in the building.

I need to replace the blue pipe in the plumbing system.

Blue carbon refers to the carbon stored in coastal and marine ecosystems such as mangroves, seagrasses, and salt marshes.

She wore a beautiful dress in Yale blue.

She blue-pencils the document before submitting it.

The editor blue-pencilled the manuscript before it was published.

The editor blue-penciled the article before it was published.