藍

1. Origins, structure, and basic meaning

• Structure: 藍 is read あい; when it combines with 色, 藍色 is read あいいろ.
• Basic usage: 藍 refers to the indigo plant and to the indigo color associated with it.
  • 藍の葉 refers to indigo leaves used to make dye.
  • 深い藍に染める describes the result of dyeing something a deep indigo.

2. Common pitfalls and similar expressions

• Plant and color
  • Contexts centered on leaves, cultivation, or dye material use the plant sense; cloth, dyeing results, or color descriptions use the color sense.
  • Translating every use only as a color removes the plant or material meaning from some sentences.
• Nearby color terms
  • 青(あお) can refer broadly to the blue range.
  • 紺(こん) denotes navy or dark blue, but it is not always identical to 藍色, nor are the terms divided by an exact numerical brightness threshold.
• Homophone 愛
  • 藍 and 愛 are both read あい.
  • Contexts about plants, dyeing, and color point to 藍; contexts about love and affection point to 愛.