This is the 16110th most frequent Korean word.
분홍빛
Pink tint.
Here, '분홍빛' is used as an adjective describing the color of the roses.
나는 분홍빛 장미를 좋아합니다.
I like pink-colored roses.
This usage of '분홍빛' metaphorically describes the smile as carrying the charm associated with the color pink.
그녀의 얼굴에 분홍빛 미소가 피었다.
A pink-tinted smile bloomed on her face.
In this sentence, '분홍빛' is employed as a descriptive term for the color of the sky.