The sky is blue.

I added a few drops of blueing to the laundry to make the whites appear brighter.

I used blueing to make my laundry whiter.

The sky is a beautiful shade of blue.

The artist used indigo dye to blue the fabric for her latest creation.

Tatoo blued his upper arms.

She painted the sky with a beautiful shade of cobalt blue.

She had a black-and-blue bruise on her arm.

The doctor diagnosed the baby with blue baby syndrome.

I found a blue box in the attic.