紺色

1. Origins, structure, and basic meaning

• Structure: 紺色 is read こんいろ and means navy blue, a deep shade of blue.
• Basic usage: It is used for the color of a uniform or a painted background representing the night sky.

2. Common pitfalls and similar expressions

• Connecting a color noun
  • In 紺色の制服, の connects the color to the noun it describes; in 紺色に塗った, に marks the resulting painted color.