blue eyebrow pencil; blue eyebrows
Refers to a traditional cosmetic used to paint eyebrows blue, or the resulting blue eyebrows themselves. Associated with historical or classical makeup styles.
Women in the Heian period drew their eyebrows with blue eyebrow pencil.
Describes a rich, dark blue color, often used in poetic or literary contexts. The term is relatively rare in modern everyday language.
Stars were shining in the deep blue sky.