黒くろ葦あし毛げ

noun

steel gray (horse coat color)

Refers specifically to a horse coat color: a dark gray or steel gray, often with a mix of black and white hairs. Used in equestrian and breed description contexts.

• その馬うまは黒くろ葦あし毛げの美うつくしい毛け並なみをしている。

  That horse has a beautiful steel gray coat.