濃紺

1. Origins, structure, and basic meaning

• Structure: 濃紺, read のうこん, is the color noun dark navy blue.
• Basic usage: 濃紺の上着 modifies a coat's color; 濃紺に染めた布 marks the result of dyeing fabric.

2. Common pitfalls and similar expressions

• Color modifier and dyed result
  • Use の before the colored noun and に before 染める to mark the resulting shade.