瑠璃色

1. Origins, structure, and basic meaning

• Structure: Written 瑠璃色 and read るりいろ, it denotes a deep, vivid blue associated with lapis lazuli.
• Basic usage: It is used to describe richly colored sky, glass, or fabric.

2. Common pitfalls and similar expressions

• More specific than blue
  • The shade is a saturated deep blue, sometimes with a violet cast, rather than pale sky blue.