blue-black

American  

[bloo-blak] / ˈbluˈblæk /

adjective

1. black with bluish highlights.

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Other Word Forms

• blue-blackness noun

Etymology

Origin of blue-black

First recorded in 1815–25

Example Sentences

The large blue-black wasps with bright orange wings are “a much better way to estimate the spider population than trying to actually find the spiders, which are intensely secretive,” Yanega said.

From Los Angeles Times • Aug. 4, 2025

However, the huckleberry provides more wildlife benefits with spring flowers for native pollinators, followed by blue-black berries for wild birds in late summer.

From Seattle Times • Jan. 13, 2024

At this moment, the sky will turn from light blue to dark blue-black, and you will be able to suddenly see a few stars in the sky along with the planet Mercury.

From Salon • Apr. 27, 2023

I love the NHS but I truly lost faith in the healthcare system when three doctors, including a dermatologist, failed to recognise that a growing blue-black mole indicated I could have skin cancer.

From BBC • Feb. 4, 2023

She turned up her hood to hide her swollen face and left him there in the dark beneath the oak, amidst the quiet of the godswood, under a blue-black sky.

From "A Game of Thrones" by George R.R. Martin