September's birthstone is sapphire, a deep royal blue tied to wisdom, loyalty, and nobility.
Sapphire's signature is a rich, saturated blue, deeper and more velvety than most. It is one of the most storied blues in gemstone history.
The stone has symbolised truth, faithfulness, and noble character for centuries and often appears in royal jewelry. Its depth makes it a commanding palette anchor.
The palette
The colors
Colors that have their own encyclopedia page link to it; the rest show their exact hex.