Prussian blue; deep blue; dark blue; ultramarine
Refers to a deep, vivid blue pigment or color, historically associated with Prussian blue. Used in artistic, descriptive, and technical contexts.
He painted the sky with Prussian blue paint.
A deep blue sea stretched out before us.
Prussian blue; deep blue; dark blue; ultramarine
navy blue demon of hell
Compound of 紺 (dark blue) and 青 (blue). The specific term 紺青 was adopted to refer to the synthetic pigment Prussian blue, distinguishing it from other deep blues.