紺青

1. Origins, structure, and basic meaning

• Structure: 紺青 is read as こんじょう and is a color noun for a deep, vivid blue or a Prussian-blue color used in painting.
• Basic usage: Use 紺青で描く for painting in that color and 紺青の絵の具 for paint of that hue.

2. Common pitfalls and similar expressions

• Color name and paint
  • It can name the deep blue used for a sunset sea or the particular color of paint purchased at an art store.
• Instrumental で
  • In 深い紺青で描く, で marks the color or material used to paint, not a location.