noun
red-haired and blue-eyed person; Westerner
A yojijukugo used to describe a Westerner, often with a slightly old-fashioned or literary feel. Can be neutral or carry a nuance of exoticism.
幕末の日本では、紅毛碧眼の外国人は珍しかった。
In Japan at the end of the Edo period, red-haired, blue-eyed foreigners were rare.
A yojijukugo composed of 紅 (red), 毛 (hair), 碧 (blue-green), and 眼 (eye). The exact historical origin is uncertain, but it is a conventional literary description of Westerners.