紺

1. Origins, structure, and basic meaning

• Structure: 紺, read こん, is a color noun meaning navy or dark blue.
• Basic usage: It is used to describe the color of clothing or the result of dyeing fabric navy.
  • 面接には紺の上着を着ていくことにした。

2. Common pitfalls and similar expressions

• Using a color noun as a modifier
  • 紺 is a color noun, so it modifies clothing in a phrase such as 紺の上着. Unlike 青い, it is not made into an adjective by adding い directly to 紺.