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.

I love the blue buttons on my shirt.

I visited Blue Lake last summer.

I saw a beautiful blue fish while snorkeling in the ocean.

I saw a beautiful blue titmouse in the garden.

I found the phone number in the blue pages.