プルシアンブルー
also: プルシャンブルー
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Meanings
1
A deep blue pigment or color; also known as 紺青 (こんじょう). Used in art, chemistry, and as a color name.
See also: 紺青
The blue parts of this painting are done in Prussian blue.
Prussian blue is a pigment discovered in the 18th century.